Tag: burden of proof
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Inland Diamond Prods v. Cherry Optical: PTAB Fact Findings Do Not Preclude District Court Validity Challenges
On October 15, 2025, the Federal Circuit vacated and remanded a summary judgment of invalidity in Inland Diamond Products Co. v. Cherry Optical Inc., No. 24-1106, holding that the district court improperly applied issue preclusion based on prior PTAB inter partes review decisions. The ruling reinforces a principle the court has been developing with increasing…
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Federal Circuit Vacates PTAB Decision in CQV Co. v. Merck Patent GmbH, Raising Key Issues in Patent Infringement and Prior Art Analysis
The United States Court of Appeals for the Federal Circuit recently issued an opinion in CQV Co., Ltd. v. Merck Patent GmbH, vacating and remanding the Patent Trial and Appeal Board (PTAB) decision regarding U.S. Patent No. 10,647,861. The ruling focuses on key legal issues related to patent infringement, prior art determination, and procedural fairness…