( May 28, 2025, 11:10 AM EDT) -- WASHINGTON, D.C. — The U.S. Patent Trial and Appeal Board (PTAB) erred in its analysis of the motivation to combine prior art references in post-grant review proceedings for a patent describing a type of lighting structure, a Federal Circuit U.S. Court of Appeals panel held May 27, finding that PTAB improperly imposed a quantification requirement that was “overly rigid and inconsistent with well-established precedent.”...