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

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

In other news, Ericsson sought a declaratory judgment against Acer and Netflix filed a cease-and-desist letter against ByteDance over AI misuse
As trade secret filings rise due to AI development and economic espionage concerns, firms are relying on proactive counselling to help clients navigate disputes
IP firm leaders share why they remain positive in the face of falling patent applications from US filers, and how they are meeting a rising demand from China
The power of DEI to swing IP pitches is welcome, but why does it have to be left so late?
Mathew Lucas has joined Pearce IP after spending more than 25 years at Qantm IP-owned firm Davies Collison Cave
Exclusive survey data reveals a generally lax in-house attitude towards DEI, but pitches have been known to turn on a final diversity question
Managing IP will host a ceremony in London on May 1 to reveal the winners
Abigail Wise shares her unusual pathway into the profession, from failing A-levels to becoming Lewis Silkin’s first female IP partner
There are some impressive AI tools available for trademark lawyers, but law firm leaders say humans can still outthink the bots
Lawyers at Simmons & Simmons look ahead to a UK Supreme Court hearing in which the court will consider whether English courts can determine FRAND terms when the licence is offered by an intermediary rather than an SEP owner
Gift this article