The question of whether an AI can be a patent inventor has a clear answer in the United States: no. An inventor on a US patent must be a natural person, which means an artificial-intelligence system cannot be named as the inventor — only a human can. But that clean rule sits next to a more important one for the field's practitioners: inventions made with the help of AI remain patentable, provided a human who contributed significantly to the invention is named. The distinction between "AI as inventor" (not allowed) and "AI-assisted invention" (allowed) is the whole ballgame.

The leading authority is Thaler v. Vidal, decided by the US Court of Appeals for the Federal Circuit in 2022. Stephen Thaler had filed applications naming an AI system he called DABUS as the sole inventor. The USPTO rejected the filings for lacking a valid inventor, and the Federal Circuit affirmed. Its reasoning was statutory: the Patent Act defines an inventor as an "individual," and the court read "individual" — consistent with ordinary usage and Supreme Court precedent on that word — to mean a natural person, a human being. The Supreme Court declined to take the case, leaving the Federal Circuit's holding as the controlling rule. Under it, an AI system has no standing to be an inventor regardless of how much it contributed to conceiving the invention.

What the USPTO did next

Thaler answered the narrow question but left an enormous practical one open: if researchers increasingly use AI tools to help generate inventions, can those inventions still be patented, and who gets named? The USPTO answered with its Inventorship Guidance for AI-Assisted Inventions, issued in February 2024 (89 FR 10043). The guidance does not change the natural-person rule — it reaffirms it — but it makes explicit that the use of an AI tool does not, by itself, disqualify an invention from patenting.

"There is no separate or modified standard for AI-assisted inventions."— USPTO, Inventorship Guidance for AI-Assisted Inventions, source

That sentence carries the policy. The same legal standard for inventorship applies whether or not an AI system was used in the inventive process. The operative test, which long predates AI, is whether a natural person made a significant contribution to the conception of the claimed invention. The guidance directs applicants and examiners to apply the established factors used to assess contribution among multiple human inventors — the so-called Pannu factors — to the human's role relative to the AI tool. If at least one natural person contributed significantly to the conception of at least one claim, that person is a proper inventor and the invention is patentable. The AI tool's involvement is not named and does not defeat the application.

Conversely, the guidance is equally clear that a human cannot be named as inventor for an invention where the human did not make a significant contribution — merely owning or operating the AI, or recognizing a problem without contributing to its solution, is not enough. So the regime has two edges: AI cannot be named, and a human can only be named if their contribution genuinely rises to the level of inventorship. An invention conceived entirely by an AI with no qualifying human contributor falls into a gap — no AI inventor is permitted, and no human qualifies — and would not be patentable as filed.

Why this matters for AI patent strategy

For companies building AI systems and for those using AI in R&D, the guidance turns inventorship into a documentation discipline. Because the standard hinges on human contribution to conception, the record of who did what — who framed the problem, who designed the approach, who recognized the inventive significance of an AI-generated output — becomes the evidence that supports a valid inventor designation. Inventorship is not a formality: naming the wrong inventors, or failing to name a true inventor, can render a patent unenforceable, so the AI-assisted context raises the stakes on getting the human contribution right and recorded.

The international picture reinforces the US position rather than contradicting it. The same DABUS applications were rejected on similar natural-person grounds in the United Kingdom and at the European Patent Office, with courts and boards reaching parallel conclusions that an inventor must be a human. That convergence means the practical rule is stable across the major jurisdictions an AI patent filer cares about: name the human contributors, do not name the AI, and ensure at least one named human made a significant contribution to each claimed invention.

It is worth being precise about what the guidance does and does not change, because the line is easy to blur. It does not create an "AI inventor" category, does not lower the conception standard, and does not require disclosing that an AI tool was used. What it does is confirm that the pre-existing, human-centric inventorship analysis applies unchanged, and supply guideposts — drawn from the established joint-inventorship case law — for evaluating whether a person's contribution alongside an AI tool was significant enough to qualify. In effect, the USPTO mapped a settled doctrine onto a new fact pattern rather than writing new law. That choice keeps AI-assisted inventions inside the ordinary system: the examiner asks the same question asked of any multi-contributor invention — did this named person significantly contribute to the conception of this claim — and the AI tool's role, however large, is simply not part of the inventor calculus.

The bottom line is two-part and both parts are load-bearing. First, an AI cannot be a named inventor on a US patent — Thaler v. Vidal settles that the inventor must be a natural person. Second, AI-assisted inventions are not categorically unpatentable — the USPTO's 2024 guidance confirms the ordinary inventorship standard applies, with no special rule for AI, so a human who significantly contributed to the conception is named in the usual way. The combination is what makes the modern AI patent system workable: the tool does not get credit, but using the tool does not forfeit the patent.