( March 21, 2025, 8:22 AM EDT) -- WASHINGTON, D.C. — A Federal Circuit U.S. Court of Appeals panel said the Patent Trial and Appeal Board (PTAB) was correct to find that a petitioner lighting company failed to establish obviousness as to a claim in a patent for a recessed lighting system, holding that the company’s arguments are based in part on an attempt to raise new unpatentability grounds on appeal....