Patents

UKSC rejects Thaler and DABUS

The United Kingdom Supreme Court has ruled that DABUS is not an inventor for the purposes of UK patent law and so Dr Thaler’s applications for a patent claimed to be invented by DABUS have failed.

You will recall that Dr Thaler has applied in the UK (and many other parts of the world) for the grant of patents in his name for inventions said to have been generated by a machine acting autonomously and powered by the artificial intelligence, DABUS.

Section 7 of the UK Patents Act 1977 provides in part:

7 Right to apply for and obtain a patent.

(1) Any person may make an application for a patent either alone or jointly with another.

(2) A patent for an invention may be granted—

(a) primarily to the inventor or joint inventors;

(b) in preference to the foregoing, to any person or persons who, by virtue of any enactment or rule of law, or any foreign law or treaty or international convention, or by virtue of an enforceable term of any agreement entered into with the inventor before the making of the invention, was or were at the time of the making of the invention entitled to the whole of the property in it (other than equitable interests) in the United Kingdom;

(c) in any event, to the successor or successors in title of any person or persons mentioned in paragraph (a) or (b) above or any person so mentioned and the successor or successors in title of another person so mentioned;

and to no other person.

(3) In this Act ‘inventor’ in relation to an invention means the actual deviser of the invention and ‘joint inventor’ shall be construed accordingly.

(4) Except so far as the contrary is established, a person who makes an application for a patent shall be taken to be the person who is entitled under subsection (2) above to be granted a patent and two or more persons who make such an application jointly shall be taken to be the persons so entitled.

Further, section 13 reinforced the centrality of the position of “the inventor” in the scheme of the Act.

Lord Kitchin pointed out that s 7(2) read with s 7(3) provides an exhaustive code for determining who is entitled to a patent. And, just like s 15(1) of the Patents Act, that is the inventor or someone claiming through the inventor.

Unlike the Australian Act, section 7 of the UK Act also includes s 7(4) which defines the inventor as “the actual deviser of the invention”.

Unlike the approach taken by the Australian High Court, Lord Kitchin (with whom Lords Hodge, Hamblen, Leggatt and Richards agreed) considered it was entirely proper for the Comptroller-General to take Dr Thaler’s statements at face value.

Accordingly, at [56], Lord Kitchin ruled that an inventor for the purposes of the Patents Act 1977 must be a natural person and, as DABUS was not a person, it was not the inventor.

In my judgment, the position taken by the Comptroller on this issue is entirely correct. The structure and content of sections 7 and 13 of the Act, on their own and in the context of the Act as a whole, permit only one interpretation: an inventor within the meaning of the 1977 Act must be a natural person, and DABUS is not a person at all, let alone a natural person: it is a machine and on the factual assumption underpinning these proceedings, created or generated the technical advances disclosed in the applications on its own. Here I use the term “technical advance” rather than “invention”, and the terms “create” or “generate” rather than “devise” or “invent” deliberately to avoid prejudging the first issue we have to decide. But it is indisputable that DABUS is a machine, not a person (whether natural or legal), and I do not understand Dr Thaler to suggest otherwise.

As in the Australian cases, Dr Thaler advanced an alternative claim based on the “doctrine of accession”. Thus, Dr Thaler claimed he was entitled to the patent as the owner of DABUS and so entitled to any fruits of its production.

At [83], Lord Kitchin explained Dr Thaler’s contention based “purely” on ownership of the machine:

The DABUS inventions are, he says, the fruits of (in the sense they were produced by) the DABUS machine that he owns and further, that DABUS was designed to make inventions and so these fruits were by no means unexpected. He also contends that he was and remains the first person to possess the inventions and this provides a proper basis for their ownership. In short, he contends that he derived title by operation of a rule of law (the doctrine of accession) that satisfied the terms of section 7(2)(b) of the Act and conferred on him the right to apply for and secure the grant of patent protection for any inventions made by DABUS.

This contention failed. First, as DABUS was not an inventor, at [84] it gave rise to no rights which could be claimed. That was sufficient for the application to fail.

Secondly, in any event, Dr Thaler’s invocation of the doctrine of accession was entirely misplaced. The doctrine of accession applied to new tangible property (e.g. a calf) produced by an existing tangible property (e.g. a cow), not intangible property such as inventions. At [88] – [89], Lord Kitchin explained:

We are not concerned here with a new item of tangible property produced by an existing item of tangible property, however. We are concerned with what appear (and which for present purposes we must assume) to be concepts for new and non-obvious devices and methods, and descriptions of ways to put them to into practice, all of which, so Dr Thaler maintains, have been generated autonomously by DABUS. There is no principled basis for applying the doctrine of accession in these circumstances.


For these reasons and those given by the Court of Appeal, I am satisfied that the doctrine upon which Dr Thaler relies here, that of accession, does not, as a matter of law, operate to confer on him the property in or the right to apply for and obtain a patent for any technical development made by DABUS.

As the Comptroller-General was entitled to take Dr Thaler’s claims at face value, the Comptroller-General was entitled to reject the applications as they were obviously defective: they did not identify anyone who could be the inventor or any basis on which Dr Thaler could claim to derive title from an inventor.

It should be noted that Lord Kitchin was at pains to point out that the Court was concerned with a narrow question: the meaning of section 7 and associated provisions in the UK Act. It was not concerned, he considered with broader, policy questions. His Lordship explained at [48] – [50]:

The Comptroller has emphasised, correctly in my view, that this appeal is not concerned with the broader question whether technical advances generated by machines acting autonomously and powered by AI should be patentable. Nor is it concerned with the question whether the meaning of the term “inventor” ought to be expanded, so far as necessary, to include machines powered by AI which generate new and non-obvious products and processes which may be thought to offer benefits over products and processes which are already known.


These questions raise policy issues about the purpose of a patent system, the need to incentivise technical innovation and the provision of an appropriate monopoly in return for the making available to the public of new and non-obvious technical advances, and an explanation of how to put them into practice across the range of the monopoly sought. It may be thought that the rapid advances in AI technology in recent times render these questions even more important than they were when these applications were made.


This appeal is concerned instead with the much more focused question of the correct interpretation and application of the relevant provisions of the 1977 Act to the applications made by Dr Thaler. This was the approach taken by the Comptroller, the High Court and the Court of Appeal, and rightly so.

Dr Thaler having failed to identify an inventor through whom he could claim entitlement, the Comptroller-General had been right to deem the applications withdrawn.

Thaler v Comptroller-General of Patents, Designs and Trade Marks [2023] UKSC 49 (20 December 2023)

UKSC rejects Thaler and DABUS Read More »

To be estopped or not …

O’Bryan J has ruled that Vehicle Management Systems (VMS) is not estopped from seeking revocation of Orikan’s patent despite earlier opposition proceedings in which VMS could have raised the allegations, but did not.

Under the pre Raising the Bar versions of the Patents Act, it was clearly established that an unsuccessful opponent was not estopped from subsequently seeking revocation on the same grounds. This was at least because of the different onus: an opponent had to show that it was “practically certain” the patent application was invalid to succeed whereas a party seeking revocation only had to satisfy the balance of probabilities standard.[1] The Raising the Bar amendments, however, sought to change the burden at the examination and opposition stages to the balance of probabilities standard. The debate since then has been whether this meant an unsuccessful opponent was estopped from seeking revocation on the same grounds.

Overview

Orikan is the registered owner of Australian Patent No. 2013213708 titled “Vehicle Detection”, having been assigned the patent by SARB Management Group. It has sued VMS for infringement. In addition to denying infringement, VMS has cross-claimed seeking revocation of the Patent. So, this is another campaign between VMS and SARB-related entities over competing systems and apparatus to detect cars which have overstayed parking.

In this particular application, Orikan was seeking to have VMS’ cross-claim stayed on grounds of Anshun estoppel or, alternatively, as an abuse of process.

Some background

Back in happier days, VMS and SARB had explored jointly developing systems for detecting vehicles which were parked without paying the fee or after the alotted time had expired.

Things didn’t work out and, by a decision handed down in 2013, VMS successfully sued SARB for infringement of one of VMS’ patents for vehicle detection systems.

In 2008, however, SARB had applied for its own patent. That application led to two divisional patents: Australian Patent No. 2011101179 (Innovation Patent), which was filed in 2011, and secondly the Patent the subject of these proceedings, which was filed in 2013. As you might suspect, there was considerable overlap between the claims of the Innovation Patent and the Patent.

In 2012, SARB sued VMS for infringement of the Innovation Patent. VMS defended, including a cross-claim for invalidity on grounds including lack of novelty, secret use and lack of sufficiency and best method. This proceeding settled before trial in 2014.

In 2016, VMS opposed the grant of the Patent. That opposition failed in both the Office and the Court.[2] The Opposition Proceeding in the Court involved extensive evidence and 5 days’ trial. According to O’Bryan J, however, it did not involve the grounds of invalidity or particulars that VMS sought to argue in this proceeding.

In addition to challenging the priority date, clarity and sufficiency grounds, VMS sought to revoke the Patent in this proceeding on grounds of lack of novelty, secret use and failure to disclose the best method.

Given this prior history, Orikan contended VMS’ cross-claim should be stayed on grounds of either Anshun estoppel or abuse of process.

Legal tests

The parties were not really in dispute about the principles.

Anshun estoppel

At [26], O’Bryan J explained:

Anshun estoppel operates to preclude the making of a claim, or the raising of an issue of fact or law, in a subsequent proceeding if the claim or issue was so connected with the subject of an earlier proceeding that it would have been unreasonable, in the context of the earlier proceeding, for the claim not to have been made or the issue not to have been raised in that proceeding …. [3]

Thus, at [28] his Honour considered three conditions needed to be satisfied:

(1) the relevant cause of action, defence or issue must be one that could have been raised in the earlier proceeding;

(2) the same or substantially the same facts must arise for consideration in the second as in the first proceeding; and

(3) it must have been unreasonable in all the circumstances for the party not to have raised the issue in the first proceeding – i.e. it is not enough that the issue could have been raised; in all the circumstances it should have been raised.

The third requirement means the test has an element of discretion and evaluation.

The requirement of “unreasonableness” is a “severe test” and not to be made lightly. O’Bryan J noted one situation where unreasonableness was likely to be established is where a judgment or order made in the second proceeding was likely to conflict with a judgment or order in the earlier proceeding. But, the doctrine is not limited only to such situations.

Abuse of process

Abuse of process is not capable of explanation in terms of closed categories. At [38], O’Bryan J noted the principles governing its application are broader and more flexible than those governing estoppels.

In general terms what needs to be shown is that the use of the Court’s procedures would be unjustifiably oppressive to the party or would bring the administration of justice into dispute. At [39], O’Bryan J noted that this brought into play considerations of the overarching purpose of civil litigation as set out in s 37M.

Why O’Bryan J dismissed Orikan’s application

At [71], O’Bryan J accepted that Orikan, as the assignee of the rights in the Innovation Patent and the Patent, could take the benefit of an Anshan estoppel arising from the earlier proceedings. It had not been a party to the earlier proceedings but, as the assignee, was a “privy” of the SARB entity which had been.

It was not in dispute between the parties that VMS could have raised the invalidity issues it now wished to argue in the earlier Opposition Proceeding. The matters VMS now sought to rely on were either known to it or it ought to have been aware of them. In fact, the grounds and particulars had been asserted by VMS in the Innovation Patent Proceeding and, while they were different patents, they were both derived from the same parent and the claims were substantially similar.

Nonetheless, O’Bryan J considered that it was not unreasonable for VMS not to have raised the issues it now sought to agitate in the Opposition Proceeding.[4]

First, at [75] his Honour considered there was not a relevant risk of inconsistent judgments. His Honour accepted that a finding that the Patent was invalid in this proceeding would be inconsistent with the result in the Opposition Proceeding. As the grounds and particulars relied on in this proceeding were different, however, the basis of an invalidity finding in this proceeding would be different to the basis of the findings in the Opposition Proceeding.

Secondly, O’Bryan J considered at [76] there was a fundamental difference between the nature and consequences of an opposition proceeding and a revocation proceeding. The Opposition Proceeding involved an election by VMS to challenge the Patent on limited grounds. In contrast, in this proceeding, VMS was being sued for infringement and so compelled to come to court. Later, at [80] O’Bryan J noted that his conclusion might have been different if VMS had initiated the proceedings rather than being the respondent.

O’Bryan J also noted that the Innovation Patent Proceeding had not proceeded to trial and so the invalidity claims had not been tested in court.

Thirdly, O’Bryan J considered that allowing the invalidity claims to go forward in this proceeding would not result in more costs and delay than would have been the case if the claims had been brought in the Opposition Proceeding.

There was one overlap with the Opposition Proceeding in that one of Orikan’s witnesses, a Mr Del Papa, had been cross-examined about a particular document and both Mr Del Papa and the document were involved in this proceeding. However, the relevance and cross-examination in the Opposition Proceeding was limited to an issue of entitlement, not in issue in this proceeding.

Finally, O’Bryan J did not place “significant weight” on the public interest in the integrity of the Register or the fact the Act specifically provided for pre-grant oppositions.

O’Bryan J dismissed the abuse of process attack for essentially the same reasons.

An observation

Interestingly, while O’Bryan J did have regard to the in rem nature of patents, the public interest in the integrity of the Register and the specific provision in the Act for pre-grant opposition (and the change in onus), his Honour did not give those considerations much weight. His Honour eschewed adopting a general principle and instead applied an approach very heavily based on the particular facts of the case.

For example, it is often said (as is the case) that defeating an opposition is not a guarantee that the patent is valid. That is also true of an unsuccessful revocation proceeding. The fact one person’s revocation proceeding failed does not preclude anyone else seeking to revoke the patent. And there are cases where the second challenger succeeded despite the failure of the first.

In considering the fundamental difference between the nature and consequences of opposition proceedings and infringement/revocation proceedings, O’Bryan J emphasised VMS’s choice to fight the Opposition Proceeding on limited grounds in light of the nature and purpose of opposition proceedings. At [76], his Honour explained:

But the Opposition Proceeding involved an election by VMS to challenge the validity of the Patent. It did so on limited grounds, and did not raise the grounds and particulars of invalidity that had been raised in the earlier Innovation Patent Proceeding. There is no proper basis to criticise that election. …. The election made by VMS confined the scope of the issues in dispute in the Opposition Proceeding and therefore the costs and time required for its determination. That course was consistent with the overarching purpose of civil litigation expressed in s 37M of the Federal Court of Australia Act 1976 (Cth). It was also consistent with the character and purpose of pre-grant opposition proceedings, which are intended to provide a swift, economical means of settling disputes: Genetics Institute at [19]. Although it is desirable to avoid a multiplicity of proceedings and to ensure that parties address, as far as possible, the issues arising between them in a single proceeding, parties ought not to be encouraged to raise each and every possible claim or issue irrespective of the time and cost associated with doing so. Anshun estoppel must operate conformably with the demands of s 37M, as well as the substantive statutory context in which it is said to arise. (Emphasis supplied)

This suggests his Honour’s conclusion might reflect a reaction to Beach J’s heartfelt paragraph 1784. It is also consistent with a number of extra-judicial comments encouraging some effort on the part of parties to simplify proceedings. It does seem a little odd, however, that an opposition proceeding taking up 5 days’ of the Court’s time and a carefully reasoned 274 paragraph judgment might qualify as a swift economical means of resolving the dispute between the parties especially when the consequences lead to a further infringement proceeding with what promises to be an even more involved revocation component.

Orikan Group Pty Ltd v Vehicle Monitoring Systems Pty Limited [2023] FCA 1031


  1. In at least one case (which I haven’t been able to find again in the time available), the judge did warn the opponent / revoker that it was at risk of indemnity costs if its revocation action also failed.  ?
  2. There was also an appeal to the Full Court which, by the time of the hearing, was limited to the issue of entitlement.  ?
  3. Citing Anshun at 598, 602–3 (Gibbs CJ, Mason and Aickin JJ); Tomlinson v Ramsey Food Processing Pty Limited (2015) 256 CLR 507 at [22] (French CJ, Bell, Gageler and Keane JJ).  ?
  4. Yes I realise that double negatives are “awkward” (to say the least) but that the point!  ?

To be estopped or not … Read More »

ToolGen’s CRISPR/Cas9 patent application rejected

Nicholas J has ruled that ToolGen’s application for a patent, AU 2013335451, for “what is now a well-known gene editing system known as the CRISPR/Cas9 system” for editing target DNZ sequences in eukaryotic cells. His Honour has allowed ToolGen until 11 August 2023 to bring any application for leave to amend pursuant to s 105(1A).

As the complete specification was filed after 15 April 2013, the Patents Act in the form amended by the Raising the Bar Act applied.

The matter came before his Honour on ToolGen’s “appeal” from an opposition in which the Commissioner’s delegate found that all but one of the claims should be refused but allowed ToolGen 2 months to amend.

At [13], Nicholas J summarised his Honour’s findings:

For the reasons that follow I have concluded:

(a)          None of the claims are entitled to priority based on P1 (s 43(2A)). 

(b)          All of the claims lack novelty or do not involve an inventive step (s 18(1)(b)).

(c)          The complete specification does not provide an enabling disclosure of the invention (s 40(2)(a)).

(d)          The claims are not supported by matter disclosed in the specification (s 40(3)).

(e)          Claim 19 lacks clarity (s 40(3)).

More detailed consideration will have to wait for another day.

ToolGen Incorporated v Fisher (No 2) [2023] FCA 794

ToolGen’s CRISPR/Cas9 patent application rejected Read More »

Some talks (not me)

Coming up to the end of the year, there are events on reforming patent litigation practice and domain name disputes in review.

Patent litigation practice

Calling it “A very IPRIA Christmas”, IP Australia and IPRIA are hosting on 7 December at 5:30 pm an end of year celebration exploring “a wish list of practice reforms for making patent litigation in Australia (including appeals from the Office) more expeditious and cost effective.”

The event will be chaired by Justice Rofe and features Clare Cunliffe and David Shavin KC from the Bar and Lisa Taliadoros from the solicitors’ side of the profession.

Registration is free and attendance can be in person or online – although to assist catering they do ask that you register by the end of Monday 5 December if you are planning to attend at the Law School in Carlton in person.

Domain names

If domain name disputes are more your thing, the Hon. Neil Brown KC is also presenting an “Annual round-up on Domain Name Arbitration”. Topics Neil intends to cover include:

  • how the domain name process works
  • latest trends emerging from the decisions of arbitrators
  • what evidence do you need and how to collect the best evidence
  • the procedures to lodge a claim and how to defend one
  • traps for new players.

While Neil and I haven’t always seen eye to eye in particular cases, Neil has lots of experience both in the UDRP and a number of other regional and country-specific dispute resolution processes.

Neil is giving his talk online via Zoom at 10:00 am (Melbourne time; i.e. UTC +11) also on 7 December 2022.

According to his brochure, there is no need to register; just log-in. I am afraid I cannot reproduce the link so you are probably best just to email him directly.

Some talks (not me) Read More »

Thaler (DABUS) is donged Down Under

Last Friday, the clock finally ran out on Dr Thaler’s attempt to register a patent in Australia on the basis that the artificial intelligence, DABUS, was the inventor: the High Court refused special leave to appeal from the Full Federal Court’s ruling that an inventor must be a human being.

Perhaps surprisingly, the High Court did not reject the application for special leave on the grounds that an inventor for the purposes of the Patents Act must be a human being. Rather, it dismissed the application on the grounds that it is not an appropriate vehicle for the determination of the issue.

You will recall that s 15(1) of the Patents Act 1990 defines who is entitled to be granted a patent:

Subject to this Act, a patent for an invention may only be granted to a person who:

(a) is the inventor; or

(b) would, on the grant of a patent for the invention, be entitled to have the patent assigned to the person; or

(c) derives title to the invention from the inventor or a person mentioned in paragraph (b); or

(d) is the legal representative of a deceased person mentioned in paragraph (a), (b) or (c).

The Commissioner had rejected Dr Thaler’s application at the formalities stage on the basis that an inventor must be a human being. Therefore, Dr Thaler’s application failed at the formalities stage under reg. 3.2C(2)(ii) because the application identified DABUS as the inventor and DABUS was an artificial intelligence only.

It was an agreed fact before the Courts that DABUS was the “inventor”:

MR SHAVIN: …. [Dr Thaler] programmed the computer but he said that the way in which the computer was programmed is it acted independently in its selection of subject matter and in its generation of the invention. So, he says that he truly was not the inventor, but DABUS, the artificial intelligence, he says was the proper inventor.

Two or perhaps three matters seemed to be exercising the panel determining the special leave application.

First, there were questions directed to whether or not the case was simply one of either DABUS qualified as an inventor or there was no inventor at all for the purposes of the Act. One problem with that was that, as it was an agreed fact between the Commissioner and Dr Thaler there was no contradictor to the proposition. Notwithstanding the agreement between the parties, the panel appeared to consider that Dr Thaler himself might have been the inventor:

EDELMAN J: Mr Shavin, your submission would have a great deal of force if it were possible to exclude, immediately, without any possibility of argument, the possibility that the applicant was not the inventor, because then, once that possibility is excluded, one is left with either a presumption of the section that every invention must have an inventor – on your submission – that is wrong. Or, alternatively, an approach an inventor does not need to be a natural person, which meets some of the difficulties that the Full Court has identified. But the difficulty for this Court is that without having any submissions about the starting point, which is whether a natural person here could be the inventor, we are groping in the dark.

The idea being suggested here appears to be similar to questions of authorship in copyright law where there may be questions of degree such that the computer program is merely a tool like, say, Microsoft Word which an author uses to record his or her words compared to the computerised system used to generate telephone directories in the Phone Directories case where, the system having been designed and implemented, the Court found there was no human intervention.[1]

Secondly, if the Act did set up the dichotomy and an inventor had to be a human being, concerns were expressed that would mean there was a “gap” in the legislation – there could be “inventions” that could not be protected because there was no inventor. Thus:

EDELMAN J: If that factual and legal position is correct, and Dr Thaler is not the inventor, then there is a significant hole in the operation of section 15 because it means that you can have an invention but no inventor.

Thirdly, the panel was plainly aware that the status of DABUS as an inventor was an issue being litigated around the world and, in particular, the UK Supreme Court has listed for hearing on 27 February 2023 the legality of the procedural approach taken to reject Dr Thaler’s application.

Where does that leave matters?

Plainly, some sort of question mark hangs over the Full Federal Court’s approach.

So far, the Commissioner has not announced any change to practice about disallowing applications which identify an artificial intelligence as an inventor.

There may be a question whether someone who does not have Dr Thaler’s agenda will nominate an artificial intelligence as an inventor. The panel refusing the special leave application appeared to envisage that the person who owned, or controlled or programmed the computer might legally be able to claim inventorship. For example:

EDELMAN J: There is an easy way the question could have been raised, which could have been if the applicant had listed himself as the inventor and the Commissioner and had rejected that on the basis that he was not the inventor but the artificial intelligence was the inventor, which would then have given rise to the prospect that nobody, for the purposes of section 15, was the inventor.

There are, however, with respect any number of difficulties with this.

For example, as Mr Shavin KC pointed out, that might require the applicant to identify someone as the inventor which the applicant did not believe to be true.

Secondly, with the benefit of the special leave panel’s (non-binding) observations, does one nominate the owner, the controller or the programmer or some combination of all three as the inventor? If one nominated the wrong person, that might provide a ground for revoking any subsequent patent on the grounds of lack of entitlement or more likely fraud, false suggestion or misrepresentation.[2]

Thirdly, how would anyone ever know? In most (if not all) cases, the Commissioner is not going to be in a position to dispute the nomination of a person as an inventor. It might possibly come up in the context of an opposition or infringement / revocation proceedings but that would likely depend on something like the time-honoured tradition of a disgruntled ex-employee blowing the whistle.

If nothing else, if such things are to be protected as patents, it seems what we really need is some form of international agreement one whether they should be patentable and, if so, rules or guidelines for determining who is entitled to be the applicant. There has of course been no rush of international adoption of the extension of copyright to computer generated works. That problem, however, is becoming increasingly important as schoolkids (and millions of others) are happily playing with online AIs to generate their own art works, poems and other materials.

Thaler v Commissioner of Patents [2022] HCATrans 199 (11 November 2022)


  1. Telstra Corporation Limited v Phone Directories Company Pty Ltd [2010] FCAFC 149 at e.g. [118] – [120]. The trial judge, whose decision was upheld in that appeal, was also a member of the panel which refused special leave in Thaler.  ?
  2. Patents Act s 138(3)(a) and (e) – although, in the case of entitlement issues s 138(4) and s 22A may very well excuse inadvertent errors.  ?

Thaler (DABUS) is donged Down Under Read More »

An AI is not an inventor after all (or yet)

A strong Full Bench of the Federal Court of Australia has ruled that DABUS, an artificial intelligence, is not an inventor for the purposes of patent law. So, Dr Thaler’s application for DABUS’ patent has been rejected.[1] No doubt the robot will be back again[2] and we can expect that an application for special leave will be pending soon.

A dalek on display
By Moritz B. – Self-photographed, CC BY 2.5,

Dr Thaler had applied for a patent, No. 2019363177 entitled “Food container and devices and methods for attracting enhanced attention”, naming DABUS – an acronym for ‘device for the autonomous bootstrapping of unified sentience’ – as the inventor.

The Commissioner had rejected the application under reg. 3.2C for failure to identify the inventor. That rejection was overturned by Beach J on appeal from the Commissioner. And this was the decision on the Commissioner’s appeal.

Essentially, the Full Court ruled that an inventor for the purposes of patent law must be a natural person, not an artificial intelligence.

The Full Court held that identification of the “inventor” was central to the scheme of the Act. This is because, under s 15, only the inventor or someone claiming through the inventor is entitled to a patent.

Under the legislation before the 1990 Act, their Honours considered that an ‘actual inventor’ could be only a person with legal personality. At [98], their Honours summarised:

In each of these provisions, the ability of a person to make an application for a patent was predicated upon the existence of an “actual inventor” from whom the entitlement to the patent was directly or indirectly derived. Paragraphs (a), (c) and (e) describe the actual inventor as, respectively, a person, one that is deceased and has a legal representative (which must be a person), and one that is not resident in Australia. Paragraphs (b), (d), (f) and (fa) all contemplate an assignment happening between the patent applicant and the actual inventor. It is clear from these provisions that only a person with a legal personality could be the “actual inventor” under this legislative scheme.

This scheme, and its consequences, did not materially change under the 1990 Act.

Acknowledging that a none of the case law had to consider whether an AI could be an inventor, the Full Court noted that the ‘entitlement’ cases proceeded on the basis that ‘inventor’ meant the ‘actual inventor’. Their Honours considered the cases interpreting this expression were all premised on the ‘actual inventor’ – the person whose mind devised the claimed invention – being a natural person. At [105] and [106], their Honours explained:

None of the cases cited in the preceding five paragraphs confronted the question that arose before the primary judge of whether or not the “inventor” could include an artificial intelligence machine. We do not take the references in those cases to “person” to mean, definitively, that an inventor under the Patents Act and Regulations must be a human. However, it is plain from these cases that the law relating to the entitlement of a person to the grant of a patent is premised upon an invention for the purposes of the Patents Act arising from the mind of a natural person or persons. Those who contribute to, or supply, the inventive concept are entitled to the grant. The grant of a patent for an invention rewards their ingenuity.

Where s 15(1)(a) provides that a patent for an invention may only be granted to “a person who is an inventor”, the reference to “a person” emphasises, in context, that this is a natural person. …. (emphasis supplied)

Given that conclusion, and the structure of s 15, Dr Thaler’s argument that he was entitled on the basis of ownership of the output of DABUS’ efforts was to no avail. At [113]:

… having regard to the view that we have taken to the construction of s 15(1) and reg 3.2C(2)(aa) [i]t is not to the point that Dr Thaler may have rights to the output of DABUS. Only a natural person can be an inventor for the purposes of the Patents Act and Regulations. Such an inventor must be identified for any person to be entitled to a grant of a patent under ss 15(1)(b)-(d). (emphasis supplied)

The Full Court then drew support from the High Court’s reasoning in D’Arcy v Myriad esp. at [6] in which the majority emphasised that patentable subject matter had to be the product of “human action”.

Although not put in this way, it is apparent that policy considerations played a significant role in their Honours’ conclusion. At [119] to [120], their Honours pointed out:

in filing the application, Dr Thaler no doubt intended to provoke debate as to the role that artificial intelligence may take within the scheme of the Patents Act and Regulations. Such debate is important and worthwhile. However, in the present case it clouded consideration of the prosaic question before the primary judge, which concerned the proper construction of s 15 and reg 3.2C(2)(aa). In our view, there are many propositions that arise for consideration in the context of artificial intelligence and inventions. They include whether, as a matter of policy, a person who is an inventor should be redefined to include an artificial intelligence. If so, to whom should a patent be granted in respect of its output? The options include one or more of: the owner of the machine upon which the artificial intelligence software runs, the developer of the artificial intelligence software, the owner of the copyright in its source code, the person who inputs the data used by the artificial intelligence to develop its output, and no doubt others. If an artificial intelligence is capable of being recognised as an inventor, should the standard of inventive step be recalibrated such that it is no longer judged by reference to the knowledge and thought processes of the hypothetical uninventive skilled worker in the field? If so, how? What continuing role might the ground of revocation for false suggestion or misrepresentation have, in circumstances where the inventor is a machine?

Those questions and many more require consideration. Having regard to the agreed facts in the present case, it would appear that this should be attended to with some urgency. However, the Court must be cautious about approaching the task of statutory construction by reference to what it might regard as desirable policy, imputing that policy to the legislation, and then characterising that as the purpose of the legislation …. (emphasis supplied)

Finally, in this quick reaction, it can be noted that the Full Court recognised that their Honours’ decision was consistent with the English Court of Appeal’s decision on the counterpart application. Their Honours considered, however, there were sufficient differences in the legislative schemes that a wholly autocthonous solution should be essayed.

Commissioner of Patents v Thaler [2022] FCAFC 62 (Allsop CJ, Nicholas, Yates, Moshinsky And Burley JJ)


  1. Patent application No. 2019363177 entitled “Food container and devices and methods for attracting enhanced attention”  ?
  2. With apologies to you know who.  ?

An AI is not an inventor after all (or yet) Read More »

Aristocrat gets special leave

The High Court has granted Aristocrat special leave to appeal the Full Federal Court’s ruling that Aristocrat’s application for an electronic gaming machine (EGM or “pokie”) was not patentable subject matter.[1]

The patent application

Aristocrat’s application is entitled ‘A system and method for providing a feature game’ – App. No. 2016101967; yet another problematic “innovation” patent.

The Commissioner and Aristocrat were in agreement that the case rose or fell on the patentability of claim 1:

(1) A gaming machine comprising:

(1.1) a display;

(1.2) a credit input mechanism operable to establish credits on the gaming machine, the credit input mechanism including at least one of a coin input chute, a bill collector, a card reader and a ticket reader;

(1.3) meters configured for monitoring credits established via the credit input mechanism and changes to the established credits due to play of the gaming machine, the meters including a credit meter to which credit input via the credit input mechanism is added and a win meter;

(1.4) a random number generator;

(1.5) a game play mechanism including a plurality of buttons configured for operation by a player to input a wager from the established credits and to initiate a play of a game; and

(1.6) a game controller comprising a processor and memory storing (i) game program code, and (ii) symbol data defining reels, and wherein the game controller is operable to assign prize values to configurable symbols as required during play of the game,

(1.7) the game controller executing the game program code stored in the memory and responsive to initiation of the play of the game with the game play mechanism to:

(1.8) select a plurality of symbols from a first set of reels defined by the symbol data using the random number generator;

(1.9) control the display to display the selected symbols in a plurality of columns of display positions during play of a base game;

(1.10) monitor play of the base game and trigger a feature game comprising free games in response to a trigger event occurring in play of the base game,

(1.11) conduct the free games on the display by, for each free game, (a) retaining configurable symbols on the display, (b) replacing non-configurable symbols by selecting, using the random number generator, symbols from a second set of reels defined by the symbol data for symbol positions not occupied by configurable symbols, and (c) controlling the display to display the symbols selected from the second set of reels, each of the second reels comprising a plurality of non-configurable symbols and a plurality of configurable symbols, and

(1.12) when the free games end, make an award of credits to the win meter or the credit meter based on a total of prize values assigned to collected configurable symbols.

(emphasis supplied by Middleton and Perram JJ).

The new or innovative feature lay in the feature comprising the free game integer – integers 1.10 to 1.12. It was apparently common ground that the other features were part of the common general knowledge for electronic gaming machines.

In the Full Court, Middleton and Perram JJ at [3] and [4] explained:

3 It is not suggested that there is anything inventive about Claim 1’s EGM except for its feature game and it is in all other respects an unremarkable EGM. (Because the 967 Patent is an innovation patent strictly the question is whether there is anything innovative about it, but nothing turns on the distinction between inventive and innovative for present purposes). A feature game is a secondary game awarded to a player on the occurrence of a defined event in the ordinary or ‘base’ game of spinning reels, termed a ‘trigger event’. Once the feature game is enlivened by the trigger event the feature game appears and the player is able to play it and potentially to win further prizes. When the feature game is completed the EGM reverts to the base game.

4 The point of feature games is to encourage players to keep wagering on the EGM by making it more interesting to do so. Since the revenue generated by an EGM is a function of the amount wagered upon it – in New South Wales up to 15% in the long run – the more successful a feature game is in keeping the player wagering, the more lucrative the EGM is for its operator. A successful feature game is therefore commercially valuable both from the perspective of the class of persons who operate EGMs and from the perspective of those who manufacture and distribute them to that class. The Respondent (‘Aristocrat’) is part of a world-wide group of companies engaged in the manufacture and distribution of EGMs and is the particular member of the group which owns the 967 Patent.

Their Honours then explained how the free game feature worked at [11] – [12]:

11 The game defined by integers 1.10–1.12 is in fact not a single game at all but rather a family of games with particular common attributes. On the occurrence of a trigger event (integer 1.10) the player is awarded one or more free games of the feature game (integer 1.11). The feature game (integer 1.11) consists of a second set of reels. Amongst the symbols on these reels are ‘configurable’ symbols. The patent does not define a configurable symbol but it does provide for them to be assigned prize values by the computer on which the game is played, which is known as the game controller (integer 1.6). A preferred embodiment of the invention suggests that the configurable symbol may be overlaid with the amount of the prize which has been assigned to it (although this is not a necessary feature of integer 1.11 and any symbol will do). In that preferred embodiment, the configurable symbol is an image of a pearl and it is configured by the overlaying on that image of different prize amounts, e.g., some pearls appear with ‘250’ and others with ‘1000’, where those figures represent credits.

12 Returning to the feature game, each time a configurable symbol appears in the display grid at the end of the free game that particular symbol position on the relevant reel stops spinning for any remaining free games and the configurable symbol remains locked in place in any subsequent play of the feature game (i.e. if the player still has any free games left). When the player eventually runs out of free games in the feature game a prize is awarded related to the number of configurable symbols which have been locked in place (integer 1.12). In the preferred embodiment the prize is the sum of the assigned values on the pearls which have been frozen on the display grid but integer 1.12 is consistent with the prize being calculated in some other way.

Burley J

At first instance (on appeal from the Commissioner), Burley J considered that the case law required a two stage assessment of patentable subject matter:

  1. The initial inquiry was whether or not the claim was for a mere scheme or business method of the type that was not the proper subject matter for a grant of a patent.
  2. If so, a second inquiry arose: whether or not the claim involved the creation of an artificial state of affairs where the computer was integral to the invention, rather than a mere tool in which it was performed. That is, was there invention in the computerisation of the claimed method?

Each step was to be undertaken as a matter of substance rather than mere form.

Applying that methodology, Burley J avoided the whole mere scheme or business method controversy by holding that the claim was for a mechanism of a particular construction where the integers interacted to produce a particular product – an EGM.

While this blogger welcomed the result, it did raise a rather awkward question: why did putting the integers in a box create patentable subject matter when essentially the same functionality could also be supplied over a network including, dare one say it, the Internet.

The Commissioner appealed.

The Full Court

All three judges (Middleton, Perram and Nicholas JJ) unanimously allowed the appeal. Middleton and Perram JJ delivered the main opinion and Nicholas J delivered a separate concurring opinion.

All three judges accepted unreservedly that a mere scheme or abstract idea was not patentable subject matter.

All three judges also accepted that whether something is patentable subject matter was to be determined as a matter of substance rather than mere form.

Middleton and Perram JJ

At [14] – [15], Middleton and Perram JJ considered that the feature game itself defined by integers 1.10 to 1.12 was a mere abstract idea for purposes of patent law. This was because either it was the definition of a family of games with common attributes and so akin to the rules of a game. Or it was because it was a method of increasing player interest in the EGM and so increasing the operator’s gaming revenue. On that view, it was just a business scheme or scheme.

At [16], their Honours accepted that an invention which physically embodied an abstract idea and gave it some practical application could be patentable subject matter. Thus, a mechanical poker machine which allowed a game (the abstract idea) to be played could be patentable. In such a case, however, the patent would protect the physical embodiment and not the abstract idea:

But the patent protects the invention which is the poker machine and not the abstract idea consisting of the game which it plays. This is consistent with decisions on board or card games to the effect that the game itself, no matter its ingenuity, does not comprise patentable subject matter but the physical apparatus used for playing the game (such as cards or the board) may do so ….

Crucially, their Honours then held that the implementation of the game by means of an unspecified computer program could not be a manner of manufacture unless the implementation resulted in some development of computer technology rather than its utilisation. At [18], their Honours said:

The implementation of an abstraction such as that disclosed by integers 1.10–1.12 by means of an unspecified computer program to be executed on the computer which is the game controller will not give rise to a patentable invention unless the implementation itself can be seen as pertaining to the development of computer technology rather than to its utilisation …. [2]

Middleton and Perram JJ next accepted that Burley J’s approach could be workable where the subject matter of the claimed patent was obviously implemented in a computer. In other cases, however, it had the potential to lead to a wrong result especially where “for example, whether a claimed physical apparatus such as an EGM is, in truth, no more than a particular kind of computer.”

Instead, Middleton and Perram JJ proposed at [26] a different two-step analysis:

(a) Is the invention claimed a computer-implemented invention?

(b) If so, can the invention claimed broadly be described as an advance in computer technology?

In the present case, the claimed invention was a computer-implemented invention.

First, although the apparatus claimed was an EGM (or poker machine), it was in substance a computer. At [32] – [34], their Honours found that the EGM was a game control computer (integer 1.6) attached to a random number generator (integer 1.4, another computer) with some input and output devices (respectively, integers 1.2, 1.3 and 1.5 (input) and 1.1 (output)) with associated software instructions (integers 1.7, 1.8 and 1.9 and the feature game 1.10 – 1.12).

Secondly, to avoid the (erroneous) conclusion that the claimed invention was for the practical implementation of an abstract idea in a device, at [50] their Honours considered it was necessary to distinguish between a claim for an invention which was a computer and a claim for an invention implemented in a computer.

As a claim for either type of invention could appear to be a claim for a computer, it was necessary to identify what was in fact the substance of the claimed invention.

Here, the correct characterisation of the claim had to take into account the two elements of the claim: one element being the EGM (in effect, the computer) and the other element being the feature game and, importantly, the feature game was the only innovative feature of the claim.

As the feature game was to be executed in the computer, at [56] Middleton and Perram JJ considered the relationship of the feature game elements to the computer elements was one of implementation. Accordingly, the claim was to a computer-implemented invention.

Turning to the second question (b), Middleton and Perram JJ held that the claimed invention was not directed to an advance in computer technology. At [63], their Honours said:

Because the invention is the implementation of a feature game on the computer which is an EGM, the next question is whether what is put forward as inventive (or innovative) about Claim 1 pertains to the development of computer technology or merely its use. The fact that integers 1.10–1.12 leave it entirely up to the person designing the EGM to do the programming which gives effect to the family of games which those integers define inevitably necessitates the conclusion that Claim 1 pertains only to the use of a computer. Indeed, it purports to do nothing else. Claim 1 is silent on the topic of computer technology beyond that the person implementing the invention should use some.

It did not matter that the claim improved player engagement or improved subjective satisfaction. That had nothing to do with developing or advancing computer technology. Similarly, the use of configurable symbols for prizes was of no assistance. That might advance gaming technology but was not an advance in computer technology.

Nicholas J

Nicholas J reached the same conclusion but by a somewhat different route.

Like Middleton and Perram JJ, his Honour started from the proposition that mere schemes and abstract ideas are not patentable. At [115] Nicholas J considered that to be patentable the case law required a claimed invention to relate to some technological innovation:[3]

The Full Court noted at [100] the distinction drawn in Research Affiliates at [94] between a technological innovation which is patentable and a business innovation which is not. The use of the expression “technological innovation” emphasises the need to identify a technological contribution in a field of technology. The desirability of providing patent protection to technological innovations is reflected in Art 27(1) of the Agreement on Trade Related Aspects of Intellectual Property Rights which relevantly provides that “… patents shall be available for any inventions, whether products or processes, in all fields of technology, provided that they are new, involve an inventive step and are capable of industrial application …”. The language of “technological innovation” has now been adopted in s 2A of the Act which refers to the promotion of economic wellbeing through technological innovation as an object of the Act.

An interesting invocation of the new Objects clause in the Act.

At [116], Nicholas J considered it was important to avoid an excessively rigid or formulaic approach to this issue. This was because the technological advance may lie in the field of computer technology. However, the required technological advance could also lie in a field of technology outside the computer:

… it is not appropriate to adopt an excessively rigid or formulaic approach to the question whether a computer implemented scheme is a manner of manufacture. This is especially true in situations where there may be no clear distinction between the field to which the invention belongs, and the field of computer technology. There may well be a technological innovation in the field of technology to which the invention belongs even though it cannot be said that there has been some technological innovation in the field of computers. The field of the invention may encompass different fields of technology that have their own technical problems that lie “outside the computer”. Moreover, the solutions to these problems may necessarily rely upon generic computing technology for their implementation. That does not necessarily render such solutions unpatentable.

His Honour gave as an example at [120] a computer-implemented invention for running a refrigerator in a more energy-efficient way. This might not involve an advance in computer technology but could well be patentable where the invention lay in the field of refrigeration technology. So, there could also be patentable subject matter in the way a gaming system or machine functioned even if there had not been an advance in computer technology.

Turning to Aristocrat’s patent application, Nicholas J considered at [135] that Burley J’s two-step test did not adequately address the Commissioner’s submission that the claim was for nothing more than the (unpatentable) rules of a game implemented in generic computer technology for its well-known and well-understood functions.

Citing RPL at [96], the fact that the feature game instructions were embodied in a computer was not sufficient to qualify as patentable subject matter. While the purpose of the invention was to provide a different and more enjoyable playing experience, the claim was not directed to overcoming any technological problem. At [141], his Honour explained:

The specification does not identify any technological problem to which the patent purports to provide a solution. Nor did the expert evidence (insofar as it was made available to us) suggest that the invention described and claimed in the specification was directed to any technical problem in the field of gaming machines or gaming systems. Rather, as the specification makes clear, the purpose of the invention is to create a new game that includes a feature game giving players the opportunity to win prizes that could not be won in the base game. Ultimately, the purpose of the invention is to provide players with a different and more enjoyable playing experience. The invention is not directed to a technological problem residing either inside or outside the computer.

Generic computer technology / software

While acknowledging that the phraseology had been used in earlier Full Court decisions, Middleton and Perram JJ considered at [35] to [42] that testing whether the claimed invention merely involved a generic computer or generic software was not “especially helpful”. It was preferable to focus on whether the claimed invention related to an advance in computer technology.

In contrast, Nicholas J (who had participated in the earlier cases) was not so troubled. At [112], his Honour considered it could be a useful signpost to patentability (or not) to ascertain whether the computer or software was just conventional computer technology being used for its well-known and well-understood effects.

Where to now

The law relating to “manner of manufacture” is a mess.

Following NRDC and before about the mid–2000s, the issue hardly, if ever, came up. Since the mid–2000s, there have been numerous cases; it is perhaps no exaggeration to say there are more, indeed way more, cases each year than in the previous 50 years.

And, unless one is prepared to say that it’s a computer-related invention and so it is not patentable subject matter (which the Courts repeatedly do not say), it is very hard to say what will pass the threshold and what will not.

One issue is that the cases are replete with comments like there is nothing new or inventive about that. That suggests that what is really the issue is lack of novelty or inventive step.

That though gives rise to a whole set of sub-issues. First, the whole situation is exacerbated by the abominations called “innovation patents”, which don’t actually require any invention, just that what is claimed (in effect) be new.

Secondly, proving lack of inventive step is a complicated, expensive and risky gamble – especially under our law before the Raising the Bar amendments.

Thirdly, while cases like CCOM, IBM and Welcome-Catuity could provide a principled approach to this issue, that could well end up with Australian law granting patents in circumstances where the USA and the EU would not. Not a situation the Productivity Commission would favour. And, it is far from clear that any clear or consistent approach has emerged in either jurisdiction, especially the USA.

The reason, or at least one of the reasons, why NRDC was a “watershed” in patent law was that it got rid of the artificial pigeon-holes or categories of “vendible product” which, as the NRDC judgment so tellingly demonstrated, had resulted in such inconsistent and unpredictable results to the test of manner of manufacture. Instead, it adopted an open-ended, flexible approach directed to achieving the objects of patent law.

Against that background, one might argue that Nicholas J’s approach, with respect, allows a degree of flexibility and forward-thinking which may not follow from the approach taken by Middleton and Perram JJ. Whether his Honour’s approach provides any more certainty may be debated but at least it would avoid a narrow categorisation. Whether that is an approach that finds favour with the High Court, or what direction it might take, remains to be seen.

[Some typos were corrected on 24 June 2022]


  1. That is, not a ‘manner of manufacture’ for the purposes of Patents Act 1990 s 18(1)(a) and 18(1A)(a). Exceptionally, special leave was granted on the papers.  ?
  2. Citing Commissioner of Patents v RPL Central Pty Ltd [2015] FCAFC 177; 238 FCR 27 at [96] and [102] (Kenny, Bennett and Nicholas JJ).  ?
  3. Nicholas J considered that Research Affiliates at [115] – [119] (and RPL Central applying it) broadly equated the requirement for a technical contribution or technological innovation to the “artificially created state of affairs” required under the NRDC test.  ?

Aristocrat gets special leave Read More »

The English Court of Appeal rejects AI too

The Court of Appeal has dismissed by a 2:1 majority Dr Thaler’s appeal from Marcus Smith J’s decision rejecting the patent applications on the grounds that DABUS is not an inventor.

A recap

In late 2018, Dr Thaler applied for the grant of two patents, GB18116909.4 entitled “Food Container” concerning the shape of parts of packaging for food and and GB1818161.0 entitled “Devices and Methods for Attracting Enhanced Attention” for a form of flashing light.

In his application forms, Dr Thaler named DABUS as the inventor and stated that his entitlement arose “by ownership of the creativity machine ‘DABUS’”.

In later, amended forms, Dr Thaler explained “the applicant identified no person or persons whom he believes to be an inventor as the invention was entirely and solely conceived by DABUS”.

Patents Act 1977 (UK) ss 7 and 13

Section 7 of the UK’s Patents Act 1977 defines who is entitled to apply for and obtain a patent:

7 Right to apply for and obtain a patent.

(1)Any person may make an application for a patent either alone or jointly with another.

(2)A patent for an invention may be granted—

(a)primarily to the inventor or joint inventors;

(b)in preference to the foregoing, to any person or persons who, by virtue of any enactment or rule of law, or any foreign law or treaty or international convention, or by virtue of an enforceable term of any agreement entered into with the inventor before the making of the invention, was or were at the time of the making of the invention entitled to the whole of the property in it (other than equitable interests) in the United Kingdom;

(c)in any event, to the successor or successors in title of any person or persons mentioned in paragraph (a) or (b) above or any person so mentioned and the successor or successors in title of another person so mentioned;

and to no other person.

(3)In this Act “inventor” in relation to an invention means the actual deviser of the invention and “joint inventor” shall be construed accordingly.

(4)Except so far as the contrary is established, a person who makes an application for a patent shall be taken to be the person who is entitled under subsection (2) above to be granted a patent and two or more persons who make such an application jointly shall be taken to be the persons so entitled.

Although the wording is somewhat different, ss 13(1) and (2) of the UK Act appear to be similar in effect as, respectively, s 29 and s 15 of the Australian Act.[1]

Section 13 of the UK Act further provides:

13 Mention of inventor.

(1)The inventor or joint inventors of an invention shall have a right to be mentioned as such in any patent granted for the invention and shall also have a right to be so mentioned if possible in any published application for a patent for the invention and, if not so mentioned, a right to be so mentioned in accordance with rules in a prescribed document.

(2)Unless he has already given the Patent Office the information hereinafter mentioned, an applicant for a patent shall within the prescribed period file with the Patent Office a statement—

(a)identifying the person or persons whom he believes to be the inventor or inventors; and

(b)where the applicant is not the sole inventor or the applicants are not the joint inventors, indicating the derivation of his or their right to be granted the patent;

and, if he fails to do so, the application shall be taken to be withdrawn.

(3)Where a person has been mentioned as sole or joint inventor in pursuance of this section, any other person who alleges that the former ought not to have been so mentioned may at any time apply to the comptroller for a certificate to that effect, and the comptroller may issue such a certificate; and if he does so, he shall accordingly rectify any undistributed copies of the patent and of any documents prescribed for the purposes of subsection (1) above.[2]

Can an AI be an inventor?

All three judges were in agreement that DABUS, as an AI, cannot be an inventor because an inventor must be a person.

At [116] Arnold LJ, who gave the lead judgment for the majority, said:

In my judgment it is clear that, upon a systematic interpretation of the 1977 Act, only a person can be an “inventor”. The starting point is section 130(1) which provides that “‘inventor’ has the meaning assigned to it by section 7 above”. Section 7(3) provides that “‘inventor’ in relation to an invention means the actual deviser of the invention”. A dictionary definition of “deviser” is “a person who devises; a contriver, a planner, an inventor” (Shorter Oxford English Dictionary, 5th edition, Oxford University Press, 2002). Section 7(2) provides that a patent may be granted (a) “primarily to the inventor or joint inventors”, (b) “to any person or persons who …”, (c) “the successor or successors in title of any person or persons mentioned in paragraph (a) or (b) above”, but “to no other person”. As Lord Hoffmann explained in Yeda Research and Development Company Ltd v. Rhone-Poulenc Rorer International Holdings [2007] UKHL 43, [2007] Bus LR 1796 at [20], this is “an exhaustive code”. It is clear from this code that category (a) must consist of a person or persons, just as much as categories (b) and (c) do. Section 7(4) creates a presumption that “a person who makes an application for a patent shall be taken to be the person who is entitled under subsection (2) above to be granted a patent”. Again, it is plain that only a person can be entitled under section 7(2), and thus only a person can fall within paragraph (a).

Similarly, at [50] – [51], Birss LJ said:

50 Second, a purpose of the definition of inventor in section 7(3) was to change the law, from the old law going back to the Statute of Monopolies, and to abolish the idea of a true and first inventor who could be anyone other than the actual deviser of the invention. The concept of the actual deviser of the invention was already known to United Kingdom patent law from the 1949 Act (s16). It was the person who actually devised the invention. The contrast was between that person and others who had not done so but were regarded as the true and first inventor, e.g. importers. So in Yeda paragraph [18] the contrast was drawn between the actual deviser and a pretended or deemed deviser.

51 The rest of the 1977 Act is drafted on the footing that the inventor is a person. For example s7(2)(c) of the 1977 Act refers to “person or persons mentioned in paragraph (a) or (b)” and s13 of the Act require an applicant to identify the “person or persons whom he believes to be the inventor or inventors”. However, for what it is worth, I would hold that the mechanism by which the inventor is a person in the scheme of the 1977 Act is because the “actual deviser” is a person and so, by definition in s7(3), is the inventor.

and at [54] – [55]:

54 I conclude that the answer to the first question is a simple one. Within the meaning of the 1977 Act the “inventor” is the person who actually devised the invention.

55 That conclusion is arrived at without any need to examine the policy arguments raised by both parties. Machines are not persons. The fact that machines can now create inventions, which is what Dr Thaler says happened in this case, would not mean that machines are inventors within the meaning of the Act. Assuming the machine is the entity which actually created these inventions, it has no right to be mentioned as the inventor and no right to employee’s compensation under s39 (which no doubt it never had anyway).

At [102], Lady Justice Elisabeth Laing explained:

Both Birss LJ and Arnold LJ agree that the clear effect of the relevant provisions of the 1977 Act is that an inventor must be a person. I also agree with that conclusion. Rights are a consistent theme which runs through section 7. Only a person can have rights. A machine cannot. The premise of section 7 is that an inventor is and can only be a person. A patent can be granted ‘primarily to the inventor’, and only to someone else in the circumstances described in section 7(2)(c) and (d). A patent is a statutory right and it can only be granted to a person. That means that the effect of section 7(2)(a) is that the inventor must be a person. Only a person can make, before the invention is made, an enforceable agreement by which he is entitled to the whole of the property in the invention (other than equitable interests) (section 7(2)(b)). Such an agreement can only be made with another person. Only a person can have a successor in title (section 7(2)(c)). It follows that, absent a statutory deeming provision, it is simply not possible, as a matter of law, for Dabus to be an ‘inventor’ for the purposes of section 7. Nor, for the reasons given by Arnold LJ, has Dr Thaler identified any enactment of rule of law by which he is entitled to that property (even if he could, that would not help his case, because it would not overcome the hurdle that Dabus in not an inventor for the purposes of the Act). Only a person has a right to be named as an inventor (section 13(1)). Section 13(2)(a) also assumes that the inventor is a person. Arnold LJ gives many other examples of provisions in the 1977 Act which support that construction.

Dr Thaler was not entitled to the inventions

In the Court of Appeal, Dr Thaler appears to have shifted ground from the position taken before Marcus Smith J.

Dr Thaler accepted he was not entitled to the inventions under s 7 as the inventor. At [124], Arnold LJ recorded that Dr Thaler also abandoned his claim to entitlement on the basis of an assignment from DABUS.[3] Instead, Dr Thaler based his entitlement on the doctine of accession. Dr Thaler’s argument was that as the owner of DABUS he was the owner of the inventions it produced just as the owner of a cow is the owner of its calves.

At [130], Arnold LJ cited Blackstone for the common law definition of the doctrine of accession on which Dr Thaler relied:

“The doctrine of property arising from accession is also grounded on the right of occupancy. By the Roman law, if any given corporeal substance received afterwards an accession by natural or by artificial means, as the growth of vegetables, the pregnancy of animals, the embroidering of cloth, or the conversion of wood or metal into vessels and utensils, the original owner of the thing was intitled by right of possession to the property of it under such it’s statement of improvement; but of the thing itself, by such operation, was changed into a different species, as by making wine, oil, or bread, out of another’s grapes, olives, or wheat, it belonged to the new operator; who was only to make a satisfaction to the former proprietor for the materials, which he had converted. And these doctrines are implicitly copied and adopted by our Bracton, in the reign of king Henry III; and have since been confirmed by many resolutions of the courts.”

Arnold LJ explained that the doctrine of accession was rooted in the principle of “dominion” – exclusive possession: a person who has exclusive possession of a tangible (the cow) which produces a tangible (a calf) will generally also have exclusive possession of the tangible produced.

However, an invention is information, an intangible. As an intangible, Arnold LJ noted at [133] it was distinguishable from a tangible on the basis that intangibles are non-rivalrous goods: they were capable of simultaneous consumption by more than one person. Accordingly, a new intangible is not capable of exclusive possession.

Furthermore, Dr Thaler was forced to accept that the doctrine of accession did not apply to at least some situations where an intangible was produced by a tangible. At [135], Arnold LJ gave the example of a photograph taken by A using a camera owned by B: subject to an agreement to the contrary, the copyright in the photograph would be owned by the photographer, not the owner of the camera.[4]

Arnold LJ considered that Dr Thaler’s arguments were more about what the law should be rather than what it is. As to what it is, his Lordship said at [136] it ran into two obstacles:

…. As matters stand, it seems to me that the argument faces two obstacles. The first is that it pre-supposes that a machine can be an inventor for the purposes of the 1977 Act. The second is that I cannot see any basis in current law for a person to have a legal right to stand in the place of a machine with respect to the right to apply for a patent, because that pre-supposes that the machine would otherwise have that right, but as noted above machines do not have rights. A point which underlies both these obstacles is that modern patent law is almost entirely a creature of statute.

Accordingly, Dr Thaler’s applications should be rejected.

Birss LJ dissented

Despite agreeing that an AI was not an inventor for the purposes of the Patents Act 1977, Birss LJ would have allowed the appeal. For his Lordship, it was no part of the Comptroller’s role under section 13 to inquire into whether DABUS was in fact an inventor.

To reach this conclusion, Birss LJ examined the history of s 13 and its predecessor under the Patents Act 1949, s 16. Section 16 of the 1949 Act wrought a number of changes. One of those was to permit assignment of the right to apply for a patent which in turn brought in the requirement that the assignee applicant provide an assent from the inventor.

The Banks Committee, however, reported that these arrangements had led to a number of problems. One problem was the difficulty in confidently identifying the inventors.[5] A second problem was that at the examination stage the Comptroller was in no position to check the accuracy of claims to inventorship or assignment. At [44], Birss LJ explained that the Banks Committee had recommended abolishing declarations of inventorship and assent:

This, we think, would simplify the procedure for applicants, protect patentees against invalidation of their patents through inadvertent error in naming inventors, give recognition to the fact that the Patent Office is in no position to check the completeness of declarations of assent and inventorship at present required (which therefore provide no real safeguard against wrongful obtaining of patents), and abolish the anomaly of “communicated” invention. We realise, however, that safeguards are necessary to protect the interests of inventors, and would stress that making of any application by a person other than the inventor should not imply in any way that the inventor has assented to the making of the application or acknowledged the right of the applicant to make it. Furthermore, since we believe that it is most important that the contribution of the inventor, where he is not the applicant, should not be overlooked, we recommend that the applicant, both in Convention and in non-Convention applications, should be required to name the person(s) believed to be the inventor(s), who would then be named in the published specification, but that the fulfilling of this requirement should not prejudice the right of any other person to apply under section 16 of the [1949] Act to be mentioned in the patent, nor should a bona fide error in the naming of inventors invalidate a patent. Where disputes arise over ownership of applications or patents, a new procedure will be necessary for their resolution, and this we recommend in Chapter 13.

Having regard to this history, Birss LJ considered at [58] – [59] that the requirements of s 13(2)(a) would be satisfied so long as the applicant identified who the applicant believed was the inventor. Correspondingly, s 13(2)(b) merely required the applicant to identify the basis on which the applicant claimed derivation from the inventor.

It was no part of the Comptroller’s role, at this stage, to investigate whether or not the identified inventor was in fact legally an inventor or the identified basis of derivation was legally effective. Any other approach would resurrect the very problems encountered under the 1949 Act [s 16][49uk].

In light of this conclusion, his Lordship did not consider Dr Thaler’s arguments based on the doctrine of accession.

With respect, a difficulty with Birss LJ’s approach is that an application would proceed to grant and could be asserted against third parties, or block subsequent applications, unless someone came forward to challenge the grant. And under the UK Act it seems objections on the ground of entitlement can be brought only by someone else claiming entitlement: See Birss LJ at [70] citing s 72.

Arnold LJ (with the agreement of Lady Justice Elisabeth Laing) accepted that the role of the Comptroller under s 13 was limited. His Lordship considered, however, rejection of Dr Thaler’s application did not involve such issues. Rather, the Comptroller took the information provided by Dr Thaler at face value and on its face that information failed to identify the person who was the inventor or any basis operative to transfer the rights of an inventor to Dr Thaler.[6]

As the applications failed to comply with two important statutory requirements, therefore, Arnold LJ held at [148] that the Comptroller was right to reject them.

A moral right

Before concluding, it is worth also noting that the Court of Appeal recognised that the requirement to identify the inventor is really a species of moral right. As Arnold LJ noted at [121], a paternity right: the right to be identified as the creator. At [44], Birss LJ noted the Banks Committee’s recognition that:

it is most important that the contribution of the inventor, where he is not the applicant, should not be overlooked, we recommend that the applicant, both in Convention and in non-Convention applications, should be required to name the person(s) believed to be the inventor(s), who would then be named in the published specification….

Thaler v Comptroller General of Patents Trade Marks And Designs [2021] EWCA Civ 1374 (Arnold and Elisabeth Laing LJJ, Birss LJ dissenting)


  1. See Foster’s Australia Limited v Cash’s (Australia) Pty Ltd [2013] FCA 527. Section 31 extends s 29 to joint applicants.  ?
  2. Section 13 of the UK Act does not have a counterpart in the Australian Act. However, ss 29(4A) and (4B) require applications to be in the approved form – which requires the inventor to be identified and reg. 3.2C(2)(aa) requires applications under the PCT to identify the inventor.  ?
  3. Before Beach J in Australia, Dr Thaler also accepted that, as an artificial intelligence system is not a legal person, DABUS could not legally assign the invention: see e.g. [115].  ?
  4. In Australia, see Copyright Act 1968 s 35, bearing in mind there are exceptions for works made in the course of employment, taking of photographs for a private or domestic purpose or the exception for photographs taken by journalists for newspapers etc.  ?
  5. A problem finally addressed in the Patents Act 1990 (Cth) by the enactment in the “Raising the Bar” Act of s 22A and s 138(4).  ?
  6. At [108], Lady Justice Elisabeth Laing explained “It will be clear from what I have already said that I do not agree that section 13(2)(a) only requires an applicant to ‘state their genuine belief about who the inventor was’ (judgment, paragraph 60). Rather, it expressly requires the applicant to identify the person who, he believes, is the inventor. That is a different requirement, and it is not met by a statement that the applicant genuinely believes that the invention was devised by a machine ….” (emphasis supplied)  ?

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More on DABUS – this time in Old Blighty

Ann Dufty, whom many of you will know, has pointed out to me that Dr Thaler’s lack of success in the UK was not limited “merely” to rejection by UKIPO. Dr Thaler’s patent application has been rejected by Marcus Smith J sitting in the High Court of England and Wales.

Under the Patents Act 1977 (UK) s 7(2) is in similar terms and, one might say, to the same effect as s 15 of the Australian Act:

(1) Any person may make an application for a patent either alone or jointly with another.

(2) A patent for an invention may be granted –

(a) primarily to the inventor or joint inventors; 
(b) in preference to the foregoing, to any person or persons who, by virtue of any enactment or rule of law, or any foreign law or treaty or international convention, or by virtue of an enforceable term of any agreement entered into with the inventor before the making of the invention, was or were at the time of the making of the invention entitled to the whole of the property in it (other than equitable interests) in the United Kingdom; 

(c) in any event, to the successor or successors in title of any person or persons mentioned in paragraph (a) or (b) above or any person so mentioned and the successor or successors in title of another person so mentioned; and to no other person.

(3) In this Act ‘inventor’ in relation to an invention means the actual deviser of the invention and ‘joint inventor’ shall be construed accordingly.

(4) Except so far as the contrary is established, a person who makes an application for a patent shall be taken to be the person who is entitled under subsection (2) above to be granted a patent and two or more persons who make such an application jointly shall be taken to be the persons so entitled.”

Sub-section 7(3) does not have an obvious counterpart in the Australian legislation but, DABUS aside, one would think Australian law is to the same effect. Putting to one side the question whether or not an AI can be an inventor, Australian law would consider the person who made the invention the inventor.[1]

In the English case, Dr Thaler’s substantive arguments were essentially the same as those advanced in Australia.

As to the meaning of “inventor”, Marcus Smith J at [45(3)] first noted that Lord Hoffmann in Yeda had agreed with Laddie J’s view that an inventor was a “natural person”:

The inventor is defined in section 7(3) as “the actual deviser of the invention”. The word “actual” denotes a contrast with a deemed or pretended deviser of the invention; it means, as Laddie J said in University of Southampton’s Applications [2005] RPC 220, 234, the natural person who “came up with the inventive concept.” It is not enough that someone contributed to the claims, because they may include non-patentable integers derived from prior art: see Henry Brothers (Magherafelt) Ltd v Ministry of Defence [1997] RPC 693, 706; [1999] RPC 442. As Laddie J said in the University of Southampton case, the “contribution must be to the formulation of the inventive concept”. Deciding upon inventorship will therefore involve assessing the evidence adduced by the parties as to the nature of the inventive concept and who contributed to it. In some cases this may be quite complex because the inventive concept is a relationship of discontinuity between the claimed invention and the rior art. Inventors themselves will often not know exactly where it lies.

Marcus Smith J then noted that he had not been cited any authority which explained why inventors were confined to natural persons only. His Lordship said at (a):

There is no authority to which I was referred or which I have myself been able to find which explains why the inventor is limited to natural persons only, as opposed to including also legal persons. Whilst one can see the need to limit Class (a) and so the term “inventor” to someone having personality, the exclusion of legal persons from the definition seems less clear-cut. The 1977 Act could, after all, have explicitly referred to “natural persons” rather than just the “inventor”.

Next his Lordship pointed out that DABUS was not, on any view, a person. Then, in contrast to Beach J at [135] – [145], Marcus Smith J considered that the requirement for a valid patent to have an inventive step was decisive:

It seems to me that, when once the notion of an “inventive step” is factored in, the restriction of the term “inventor” to natural person becomes inevitable. An “invention” by definition[29] must involve an “inventive step”, which is something “not obvious to a person skilled in the art”.[30] It is difficult to see how an inventive step can conceived of by a corporation – which must act through agents – without also striking one of those agents. In other words, the inventive step in the mind of a natural person is attributed to the corporation, which only has the inventive step in its “mind” by virtue of such attribution.[31] There is some sense in keeping the definition of inventor close to that which must arise out of the mind of an individual.

Accordingly, DABUS was not an inventor for the purposes of UK law.

Thaler v The Comptroller-General of Patents, Designs and Trade Marks [2020] EWHC 2412 (Pat)


  1. University of Western Australia v Gray [2009] FCAFC 116; 179 FCR 346 at [248] citing [Polwood Pty Ltd v Foxworth Pty Ltd][polworth] (2008) 165 FCR 527. For the counterparts to s 7(1) of the UK Act see ss 29 and 31.  ?

More on DABUS – this time in Old Blighty Read More »