Ethicon Endosurgery Inc. has had its hands full protecting a patent for robotic surgical systems, but the U.S. Court of Appeals for the Federal recently delivered some good news. The Federal Circuit affirmed the results of an inter partes review (IPR) of three claims for an endocutter patent, leaving Ethicon with another win in its efforts to sustain a critical patent for the robotic surgical space, and major player Intuitive Surgical Inc. coming out on the short end of the argument.