In 2023, the International Trade Commission found that Apple's blood oxygen sensors infringed on intellectual property from Masimo.

Feature had been removed from US Apple Watches after Apple lost a patent fight.

The feature was removed on select smartwatches due to a patent-infringement lawsuit, but Apple has “redesigned” it.

In 2023, the International Trade Commission found that Apple's blood oxygen sensors infringed on intellectual property from Masimo.

Apple will update some Apple Watches Thursday to add its new pulse oximeter feature that has been stalled because of an intellectual property dispute.