US Customs and Border Protection unlawfully let Apple Inc. reactivate a blood-oxygen tracking feature on Apple Watches that infringes patents for the technology, Masimo Corp. said in a federal lawsuit.CBP exceeded its authority in an Aug. 1 internal advice ruling that overturned its own January decision without notice or input from Masimo, the medical-device maker said in a complaint filed Wednesday in the US District Court for the District of Columbia. Masimo brought claims under the Administra...