Explained: Apple vs Masimo, what is the blood (oxygen) feud that led to temporary halt of Apple Watch models

Apple is in a legal battle with Masimo over blood oxygen monitoring technology. Masimo alleges that Apple’s blood oxygen monitoring feature infringes on its patented technology and accuses Apple of misappropriating trade secrets. Apple denies any wrongdoing. The dispute is being played out in courts and the US International Trade Commission (USITC), with a final verdict expected before Christmas. Apple has halted the sale of Apple Watch Series 9 and Apple Watch Ultra 2 in the US. The outcome could have implications for patent enforcement in the wearable health technology space.