Thaler v Comptroller General – an AI system cannot be an inventor

Managing IP is part of Legal Benchmarking Limited, 1-2 Paris Gardens, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Cookies Settings

Thaler v Comptroller General – an AI system cannot be an inventor

Sponsored by

twobirds-400px.jpg
Creative light bulb illustration with human brain and with man hand writing in diary on background, future technology concept. Multiexposure

In the first English court decision to consider the issue of AI inventorship, the High Court has held that an AI system cannot be considered an inventor under the Patent Act 1977.

In the first English court decision to consider the issue of AI inventorship, the High Court has held that an AI system cannot be considered an inventor under the Patent Act 1977.

Background

DABUS is a "creativity machine" created by Dr Stephen Thaler. Trained in the general knowledge of a particular field, its purpose is to independently conceive of new ideas and identify them as novel and salient. In short, DABUS is intended to be a machine capable of making inventions. In 2018, Dr Thaler filed two patent applications with the UKIPO seeking to obtain patent protection for outputs generated by DABUS. The applications listed Dr Thaler as the applicant. In documents subsequently filed with the UKIPO, Dr Thaler stated that DABUS was the inventor, and he was entitled to apply for the patents as DABUS' owner. In December 2019, the UKIPO rejected both applications, holding that Dr Thaler had failed to meet the requirement under Section 13 of the Patents Act 1977 to identify the person who he believed to be the inventor, and indicate how he derived his right to be granted a patent for the inventions.

Appeal to the High Court

Dr Thaler appealed the UKIPO decision to the High Court, maintaining that he had complied with Section 13 by identifying who he believed to be the inventor (DABUS) and how he derived his right to be granted a patent for the invention (by virtue of his ownership of DABUS). Smith J rejected the appeal in relation to Section 13, holding that Dr Thaler's subjective belief in the identity of the inventor was not sufficient. Instead, statements regarding inventorship and entitlement to apply under Section 13 must be capable of justification in the terms of the scheme set out by Section 7 of the Patents Act. In reaching this conclusion, Smith J emphasised that Section 7 provides an exhaustive code for determining who is entitled to the grant of a patent.

Who can be an "inventor" under Section 7 of the Patents Act?

Addressing Section 7, Smith J found a number of reasons why the term "inventor" under the Patents Act must be limited to natural persons. The foremost among these was that Section 7(3) specified that the inventor was the "actual deviser" of the invention, which had been interpreted by the House of Lords in Yeda v Rhone-Poulenc [2007] UKHL 43 as the "natural person who came up with the inventive concept." This did not extend to legal persons or to things, such as AI systems, with no legal personality.

Did Dr Thaler have the right to apply for the patents?

As DABUS could not be an inventor for the purposes of the Patent Act, Dr Thaler was not entitled to apply for the patents under Section 7. He did not claim to be the inventor himself, and DABUS was not a person capable of owning the right to apply itself or transferring it to Dr Thaler. There was nothing to be transferred to him and no person capable of transferring it.

Appeals have been filed by Dr Thaler in relation to the UK and EPO decisions.


Toby Bond

 

more from across site and SHARED ros bottom lb

More from across our site

The Third Circuit’s decision in Thomson Reuters v ROSS marks the first appellate-level decision addressing AI and fair use, prompting copyright counsel to consider arguments around potential licensing markets
Injunctions for HandsFree Labs and Align Technology come as the Court of Appeal warns that busy teams must have the staffing and resources to meet UPC deadlines
The chief technology officer remit, which has been created as the firm is building its litigation team, will include expanding the use of AI in patent and legal work and automating manual processes
Former Hoyng Rokh Moneiger partner Laura Alonso, who brought her team to ECIJA in March, discusses plans to expand further and why ECIJA’s ‘IP DNA’ is helping broaden her work
Amita Haylock discusses building an integrated Asia practice as clients increasingly demand that firms combine IP, technology and data expertise
François Pochart, Grégoire Desrousseaux and Lionel Martin, long-standing figures in the firm’s patent litigation team, are set to help launch a Paris-based litigation offering
The Unitary Patent has passed 100,000 registrations, but new data raises the question of whether 30% uptake is a ceiling or a staging post for further growth, say Michael Nielsen and Darren Smyth of EIP and Andrew Samm at Patently
The new generation of in-house IP leaders want commercial judgment, accessibility and flexibility, with AI raising expectations around both fees and delivery
The firm launched a San Diego office earlier this month, but California investment and expansion is far from complete
The industry’s response to AI requires an unfamiliar ingredient as firms battle to shape their futures
Gift this article