What happened. On November 26, 2025, the U.S. Patent and Trademark Office issued new inventorship guidance (formally published on November 28) clarifying how inventorship should be evaluated when AI tools are used during the development of an invention. The Office withdrew its February 2024 guidance, which had suggested applying the Pannu joint-inventorship factors to AI-assisted inventions and clarified that those factors apply only to situations involving multiple human contributors. Inventorship continues to require a natural person who formed a definite and complete idea of the claimed invention.
Takeaway. The USPTO is not creating any special rules for AI-assisted inventions. The Office is relying entirely on existing inventorship law, including the long-established conception standard. AI systems are treated the same way as other research tools, and only natural persons may be named as inventors.
Key Points to Know
AI tools are not inventors under U.S. law.
The USPTO reaffirmed that AI systems cannot be listed as inventors or joint inventors. Inventorship requires that a natural person form a definite and complete idea of the claimed invention, consistent with long-standing Federal Circuit precedent.
The inventorship standard remains conception.
The Office emphasized that the same legal standard applies to all inventions regardless of how they were created. The Office will continue to apply the traditional conception analysis. No separate test or exception has been adopted for AI-assisted work.
Joint inventorship applies only to human contributors.
If several individuals contribute to the conception of an invention, joint inventorship may be appropriate and the traditional Pannu factors continue to apply in that context. The USPTO made clear, however, that the Pannu framework does not apply when an invention is developed by a single human using AI assistance, because AI systems cannot be joint inventors. In other words, the presence of AI tools does not trigger a joint inventorship analysis, and the familiar joint inventorship principles remain limited to human contributors.
Priority claims require alignment with U.S. inventorship rules.
A U.S. application cannot validly claim priority to a non-U.S. filing that names an AI system as the sole inventor. If a non-U.S. application lists both a human and an AI system, only the human inventor may be listed on the U.S. filing. Applicants should ensure consistency across jurisdictions.
Practical Implications
The central theme of the new guidance is that AI-assisted inventions are governed by the same rules that have always applied. The USPTO is not creating new standards, modifying the inventorship test, or imposing additional evidentiary burdens. Instead, the Office is reiterating that inventorship turns solely on human conception of the claimed subject matter.
Although the legal framework is unchanged, AI-assisted R&D can raise practical questions about who conceived particular elements of an invention. Companies should be prepared to identify the human inventor who formed the complete and operative idea reflected in the claims. AI output, even if sophisticated, does not replace the need for human conception.
This clarification is also important for global filing strategies. Naming AI systems as inventors in non-U.S. patent applications can create inconsistencies that may jeopardize priority rights in the United States. Applicants should review their non-U.S. filing practices with an eye toward how different jurisdictions treat AI-assisted inventions. Although no major patent office currently permits non-human inventorship, several jurisdictions have examined or consulted on the issue. Companies should understand these differences, account for local procedural requirements, and ensure that non-U.S. filings remain compatible with U.S. inventorship rules to preserve priority rights.
Recommended Steps
To align with the USPTO’s guidance, companies should consider the following steps:
- Review current and pending filings to ensure that inventorship determinations accurately reflect human conception in AI-assisted projects.
- Implement forward-looking documentation practices that clearly record the inventive contributions of human inventors in AI-assisted R&D.
- Educate R&D teams on how AI tools should be used and how their output should be incorporated into invention disclosures.
- Coordinate global filing strategies by reviewing inventorship rules and filing requirements in each jurisdiction and ensuring that non-U.S. patent applications remain compatible with U.S. inventorship law.
Conclusion
The USPTO’s new guidance confirms that AI does not alter the fundamental standards of inventorship. Human conception remains the core requirement. For companies integrating AI into research and development, this is an appropriate time to review inventorship practices and maintain clear documentation of the human contributions that support the claimed subject matter.
