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CAFC Expert Testimony Evidence

King & Spalding

USPTO Acting Director Stewart Limits Use of General Knowledge in IPR Petitions

King & Spalding on

On July 31, 2025, Acting USPTO Director Coke Morgan Stewart released a memo instructing the agency “that applicant admitted prior art (AAPA), expert testimony, common sense, and other evidence that is not ‘prior art...more

McDermott Will & Schulte

Dim damages methods can doom bright ideas

In a mixed ruling on evidentiary exclusions and damages methodology, the US Court of Appeals for the Federal Circuit affirmed in part, reversed in part, vacated in part, and remanded a district court’s decision that excluded...more

Proskauer - The Patent Playbook

Federal Circuit Vacates $300 Million Verdict Against Apple, Orders Third Trial in LTE Patent Dispute

In a pivotal ruling for patent damages and standard-essential patent (SEP) litigation, the Federal Circuit vacated a $300 million award against Apple in a long-standing dispute with Optis Cellular Technology, LLC. See Optis...more

Irwin IP LLP

Unreliable Expert Testimony Shall Not Pass 

Irwin IP LLP on

On May 21, 2025, the Federal Circuit en banc banished the notion that the reliability of an expert’s methodology under Federal Rule of Evidence 702 (“Rule 702”) is a question of weight, not admissibility. The en banc Court...more

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