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Masimo Sues US Customs Over Apple Watch Blood Oxygen Workaround

Last week, following a recent U.S. Customs ruling, Apple reintroduced blood oxygen monitoring to certain Apple Watch models in the U.S., sidestepping an ITC import ban stemming from its legal dispute with medical device maker Masimo. Today, Masimo fired back with a new lawsuit against the U.S. Custo...

9to5Mac reports: The company says US Customs and Border Protection (CBP) overstepped its authority and violated due process when it reversed its earlier decision on August 1 and allowed Apple to restore the feature. Specifically, on August 1, 2025, CBP issued an 3 ex parte ruling permitting Apple to import devices that, when used with iPhones already in the United States, perform the same functionality that the ITC found to infringe Masimo's patents. The company is now asking the court for a temporary restraining order and preliminary injunction to block the CBP's decision, and reinstate the original ruling that "determined that Apple's redesigned watches could be imported only to the extent the infringing functionality was completely disabled."

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