Roughly four years after Intuitive Surgical Inc. petitioned for an inter partes review for a patent owned by Ethicon Endo-Surgery Inc., the Court of Appeals for the Federal Circuit affirmed the Patent Trial and Appeal Board (PTAB) finding that the first 14 claims in Ethicon’s 9,585,658 patent are invalid. While the fate of two other claims are still up in the air pending remand to the PTAB, the net effect of the hearing was significantly damaging to an Ethicon patent for surgical staplers that has been in place for only four years.