ITC Judge Rules Apple Watch Blood Oxygen Workaround Does Not Infringe Masimo Patents

Apple's current blood oxygen sensing implementation in the U.S. does not infringe on patents owned by Masimo and Apple will not face a revived import ban, a U.S. International Trade Commission judge said this week (via Reuters). After Apple was found to have violated Masimo's patents related to blood oxygen sensing, the Apple Watch faced a U.S. import ban that caused Apple to briefly pause sales of the device in December 2023 before Apple earned a temporary stay. Apple disabled blood oxygen sensing in January 2024, and was able to resume selling the Apple Watch without the functionality. In August 2025, Apple found a workaround and was able to bring blood oxygen sensing back to U.S. Apple Watch owners. Data is collected by the blood oxygen sensor on the Apple Watch, but it is processed on a paired iPhone rather than the watch itself, and the resulting information can only be viewed on the iPhone. Apple said the updated process did not violate the ITC ban, or infringe on Masimo's patent