Medical tech company Masimo is suing US Customs and Border Protection (CBP) in an attempt to overturn the agency’s decision to allow Apple to restore the blood oxygen tracking feature on Apple Watches.

Apple has been embroiled in legal disputes over Masimo’s blood oxygen sensor patent since 2020, disabling the feature on supported US Apple Watch models following an ITC import ban in December 2023. In a complaint filed on Wednesday, Masimo said that the CBP failed to notify the company of its decision to reverse the International Trade Commission restrictions, leaving Masimo with no opportunity to review or challenge the ruling. Masimo said it only learned that the ban had been reversed after Apple announced its “redesigned” pulse oximetry feature last week, which now calculates blood oxyg

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