The U.S. Court of Appeals for the Federal Circuit has once again ruled on a patent dispute between Masimo Corp., of Irvine, Calif., and a rival firm, this time with Sotera Wireless Inc., of San Diego serving as the adversary. The Federal Circuit sided with Sotera in decreeing that 17 claims in Masimo’s RE47,218 (the ’218 patent) are invalidated due to the existence of prior art that rendered the claims obvious, but the irony in this litigation is that one of the patents cited by Sotera as prior art, the 6,597,933 patent, was authored in part by Joe Kiani, the founder, CEO and board chairman of Masimo.