Extrinsic Evidence Cannot Alter Meaning of Claim Term Clearly Set Forth in Intrinsic Record

August 27, 2021

Authored and Edited by Sydney R. Kestle; Elizabeth D. Ferrill

In Seabed Geosolutions (US) Inc. v. Magseis FF LLC (Fed. Cir. Aug. 11, 2021), the Federal Circuit vacated and remanded the PTAB’s conclusion of nonobviousness, holding that the PTAB erred in relying “entirely on extrinsic evidence” to “alter the meaning” of a claim term where the intrinsic evidence was otherwise clear. Finnegan’s At the PTAB Blog explains the details of the decision.

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