( January 5, 2026, 8:21 AM EST) -- WASHINGTON, D.C. — A Federal Circuit U.S. Court of Appeals panel saw no legal or factual errors in the U.S. Patent Trial and Appeal Board’s (PTAB) affirmation of a patent examiner’s finding that all challenged claims in an internet telephone patent were unpatentable as obvious, seeing no error in how PTAB construed “telephone” or other elements....