Federal Circuit Holds That Patentee’s Disavowal of Claim Construction Warrants Reversal of Summary Judgment

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October 31, 2025

Federal Circuit Holds That Patentee’s Disavowal of Claim Construction Warrants Reversal of Summary Judgment

The Intellectual Property Strategist

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In Focus Products Group International, LLC v. Kartri Sales Co., --- F.4th ---, 2025 WL 2774853 (Fed. Cir. Sept. 30, 2025), the Federal Circuit reversed the district court’s grant of summary judgment of patent infringement to the plaintiffs because the district court adopted a claim construction that the patentee disavowed during patent prosecution and failed to adequately explain another construction. This overview focuses on the Federal Circuit’s analysis of the patent infringement claims at issue, rather than its separate analyses of trademark and trade-dress claims.

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