Last month saw the Supreme Court hear the appeal of Emotional Perception AI Limited (‘EPAI’) concerning its attempt to patent its neural network-based system for recommending music files.
In this blog, our Technology Lawyers explore the case.
Background
EPAI had applied for a UK patent for its system, which it alleged is capable of providing media file (including music) recommendations to users in an improved way. This is via the use of Artificial Neural Networks (ANNs).
ANNs are the backbone of the machine learning systems on which modern artificial intelligence systems are based.
In this instance, EPAI developed an ANN which could provide media file recommendations to a user, based on the file’s physical properties, rather than relying on categories identified by humans.
EPAI applied to the UK Intellectual Property Office (‘IPO’) to patent this ANN.
The IPO’s hearing officer deemed the system as a whole to be a computer program.
Unless computer programs demonstrate a technical effect or make a technical contribution, they are excluded under section 1(2)(c) of the Patents Act 1977.
Here, the hearing officer did not regard the system’s provision of “semantically similar file recommendations” to be of a technical nature, rendering it incapable of being granted a patent.
High Court Ruling
EPAI subsequently appealed to the High Court, which ruled in the company’s favour.
The High Court considered its system was not a computer program, due to the unique features of neural networks.
Consequently, the IPO updated its guidelines for examining patent applications in relation to inventions involving ANNs.
Court of Appeal Ruling
The head of the IPO appealed the High Court’s decision to the Court of Appeal, which allowed the appeal and restored the original decision of the IPO.
The Court of Appeal concluded that ANNs do in fact constitute computer programs, with the tool compromising of a set of instructions for a computer to do something, making it a computer program.
Moreover, as the contribution made by EPAI’s system was semantic, cognitive or aesthetic, as opposed to technical, it does not fall within the “technical exception” under section 1(2)(c).
The Court of Appeal’s decision led to the IPO issuing new guidance and suspending the changes made following the High Court’s ruling.
Supreme Court & Impact
EPAI had appealed the Court of Appeal’s decision to the Supreme Court, which heard the case on 21 and 22 July 2025.
The awaited outcome of the Supreme Court’s judgment will undoubtedly have a significant impact on the legal landscape of future inventions involving AI, such as whether ANNs or other AI software may be considered the intellectual property of the creator.
Should the appeal fail, there will continue to be a large hurdle to overcome to obtain a patent for inventions involving AI systems. Additionally, the case may have ramifications for those looking to protect computer-implemented inventions more broadly.
Contact Our Technology Lawyers
If you would like advice on protecting your invention, or believe your intellectual property rights may have been breached, contact our Technology Lawyers:
0161 941 4000