Background
IPA Technologies Inc. owns patents related to intelligent agent-based computing systems — technologies that allow software agents to perform tasks for users over a network. The patents traced their origins to research conducted at Carnegie Mellon University. Google filed inter partes review petitions challenging the validity of IPA’s patents, relying on a prior art reference — a paper that described similar technology — as an anticipating or obviousness-qualifying reference.
A critical question in the IPR was whether the prior art reference was “by another” for purposes of prior art status, or whether one of IPA’s inventors had actually contributed to and was a joint inventor of that reference. If the IPA inventor was a joint inventor of the prior art, the reference could not be used as prior art against IPA’s claims under pre-AIA law. The parties presented conflicting testimony — from inventors and other witnesses — about the nature of the IPA inventor’s contributions to the prior art reference. The PTAB found all witnesses credible and ruled that the prior art applied. IPA appealed.
The Court’s Holding
The Federal Circuit vacated and remanded. The court held that the PTAB committed legal error by purporting to find all witnesses credible when the witnesses’ accounts were in direct and irreconcilable conflict with each other. When evidence on a material factual question is contradictory, the Board cannot treat all testimony as equally credible — doing so means the Board has not actually resolved the dispute. Rather than completing its factual analysis, the Board improperly allowed conflicting evidence to coexist without making the necessary credibility and factual determinations that the record required.
The court further held that the Board was required to complete its analysis of whether the IPA inventor made an inventive contribution to the prior art reference, rather than sidestepping the conflict. On remand, the PTAB was directed to weigh the conflicting testimony, make credibility determinations, and resolve the inventorship question factually before reaching its conclusion about prior art status.
Key Takeaways
- When witnesses offer irreconcilably conflicting testimony on a material factual question in an IPR, the PTAB must resolve the conflict by making credibility determinations — it cannot deem all testimony credible and leave the dispute unresolved.
- The Board’s fact-finding authority includes the obligation to weigh competing accounts and determine which version of events is more credible when they cannot both be true.
- Whether a person is a joint inventor of a prior art reference is a factual question that must be specifically resolved when it is dispositive to prior art status; the analysis cannot be shortcircuited by treating conflicting evidence as mutually credible.
- In IPR proceedings involving prior art references with disputed inventorship — particularly academic papers or research publications where multiple researchers collaborated — parties should present clear, specific evidence of each person’s inventive contributions and be prepared for the Board to make hard credibility calls.
Why It Matters
This decision addresses a fundamental aspect of administrative fact-finding: adjudicators cannot resolve factual disputes by treating conflicting evidence as equally reliable. When witnesses give accounts that cannot both be true, the fact-finder must decide whose account to credit. The PTAB, like a court, has the authority and responsibility to make those determinations — and failing to do so is legal error that the Federal Circuit will correct.
The ruling is particularly significant in cases involving academic and research prior art, where the authorship and inventorship of papers and technical reports can be disputed. Companies using research publications as prior art in IPR proceedings should be prepared for patent owners to challenge the references’ prior art status by claiming co-inventorship, and should gather and present strong evidence about who contributed what and when to the disputed reference.