Japan Supreme Court Rules AI Cannot Be Listed as Inventor on Patent Applications

Japan's Supreme Court Rejects AI Inventorship

Japan's top court has ruled that artificial intelligence cannot be listed as an inventor on patent applications. The court determined that the legal definition of an "inventor" is limited to natural persons, meaning that AI systems lack the legal standing to hold the title of inventor regardless of their role in the creation of an invention.

This ruling concludes a legal challenge brought by Stephen Thaler, who sought to patent food containers and other items created by his AI system, DABUS. The Patent Office had previously rejected the application because Thaler refused to provide the name of a human inventor, and the Supreme Court has now upheld that decision.

Global Legal Consensus on AI and Patents

Japan's decision aligns with a growing international legal consensus that AI cannot be recognized as a legal inventor. Similar rulings have been established in other major jurisdictions:

• United States: The US Federal Circuit has ruled that only human beings can be inventors. The US Patent and Trademark Office (USPTO) has indicated that while humans may use AI tools in the invention process, a human name must be listed on the patent.
• South Africa: Notably, South Africa is one of the few jurisdictions where a patent listing an AI as an inventor has been granted, though critics point out that South Africa's patent examination process is cursory.

Technical and Practical Implications

The "Human-in-the-Loop" Requirement

The ruling does not necessarily prohibit the patenting of inventions created with the assistance of AI. Instead, it mandates that a human be credited as the inventor. This creates a practical distinction between the tool used to generate the idea and the legal entity responsible for the patent.

Risks of "AI Slop" and Patent Office Overload

Legal experts and observers suggest that requiring a human inventor serves as a critical safeguard against the automation of the patent process. Without a human requirement, AI systems could potentially generate and file millions of low-quality "slop" patents, overwhelming intellectual property bureaus and stifling genuine innovation through a flood of automated filings.

Community Perspectives and Debates

The ruling has sparked significant debate among technical and legal communities regarding the nature of intellectual property and the future of AI.

Accountability and Value Creation

Some argue that the lack of legal personhood for AI makes it impossible for them to hold patents, as they cannot be held accountable for the invention's claims or benefits. As one observer noted:

"No AI has accountability so also should not own any benefits (not only patent but anything beneficial). Violate that and you created a blackhole of value creation."

The Incentive for Non-Disclosure

There is a prevailing view that this ruling may encourage inventors to simply omit the use of AI from their applications. Since the law cannot easily distinguish between a human-derived idea and an AI-generated one, many may continue to list themselves as inventors regardless of the AI's actual contribution.

Philosophical Concerns Regarding AGI

Some commentators view these rulings as a precursor to the treatment of Artificial General Intelligence (AGI). They argue that denying rights to AI today may set a problematic precedent for the future relationship between humanity and sentient artificial beings.

Questioning the Utility of Patents

Some critics use this ruling to question the broader utility of the patent system itself, arguing that patents often act as "intellectual monopolies" that may hinder rather than help innovation, particularly in the pharmaceutical and software industries.