(September 13, 2017, 10:43 AM EDT) -- WASHINGTON, D.C. — The Patent Trial and Appeal Board, following inter partes review (IPR), did not err in deeming all 17 claims of a patented eyewear retention device obvious to a person of skill in the art, the Federal Circuit U.S. Court of Appeals ruled Sept. 12 (Cablz Inc. v. Chums Inc., et al., No. 16-1823, Fed. Cir., 2017 U.S. App. LEXIS 17561)....