Browse 8 prior art analysis in patent law cases decided by Federal Circuit. AI-powered summaries, holdings, and legal analysis.
Federal Circuit Affirms PTAB Obviousness Finding
Definitive Holdings v. Powerteq, decided by Federal Circuit on April 14, 2026, resulted in a defendant win outcome. The Federal Circuit affirmed the Patent Trial and Appeal Board's (PTAB) decision tha...
CAFC Affirms PTAB Decision, Upholding Seagen's Cancer Drug Patent
Seagen Inc. v. Daiichi Sankyo Company, Ltd., decided by Federal Circuit on December 2, 2025, resulted in a defendant win outcome. The core dispute centered on whether Daiichi Sankyo's patent for a can...
Federal Circuit Upholds Bayer's Xarelto Patent, Blocks Generic Entry
Bayer Pharma Aktiengesellschaft v. Mylan Pharmaceuticals Inc., decided by Federal Circuit on September 23, 2025, resulted in a plaintiff win outcome. The core dispute centered on whether Bayer's paten...
Federal Circuit Affirms PTAB's Obviousness Finding for Patent Claims
In Re BRUNETTI, decided by Federal Circuit on August 26, 2025, resulted in a defendant win outcome. The Federal Circuit affirmed the Patent Trial and Appeal Board's (PTAB) decision that claims of Brun...
Federal Circuit Affirms PTAB Obviousness Finding in Semiconductor Patent Case
Fisher v. United States, decided by Federal Circuit on August 12, 2025, resulted in a defendant win outcome. The case concerns whether the Patent Trial and Appeal Board (PTAB) correctly applied the "o...
CAFC Affirms Obviousness Rejection of Semiconductor Manufacturing Patent
Deal v. Collins, decided by Federal Circuit on June 27, 2025, resulted in a defendant win outcome. The case concerns whether a patent claim for a "method of manufacturing a semiconductor device" was p...
Federal Circuit Affirms PTAB Obviousness Finding for Sage Products Patent
Sage Products, LLC v. Stewart, decided by Federal Circuit on April 15, 2025, resulted in a defendant win outcome. The Federal Circuit affirmed the Patent Trial and Appeal Board's (PTAB) decision that ...
CAFC Affirms Patentability of Merck's Method of Treatment Patent
Cqv Co., Ltd. v. Merck Patent Gmbh, decided by Federal Circuit on March 10, 2025, resulted in a defendant win outcome. The core dispute centered on whether Merck's patent for a "method of treating" a ...
CaseLawBrief currently tracks 8 prior art analysis in patent law cases from Federal Circuit. This number is updated as new opinions are published.
Outcome breakdown: Defendant Win: 7, Plaintiff Win: 1.
Each case page on CaseLawBrief includes an AI-generated plain English summary, key holdings, and legal analysis. Click any case above to read its full analysis.