Masimo is seeking an import ban on Apple Watch models because of alleged patent infringement related to pulse oximetry, reports Apple Insider

Masimo, which sued Apple in 2020 for alleged patent infringement and theft of trade secrets, filed a complaint with the U.S. International Trade Commission on Tuesday. The filing claims that the Apple Watch Series 6 infringes on five patents focused on technology that uses light to measure blood oxygen levels.

According to the complaint, which was spotted by Bloomberg, the blood oxygen sensing feature is core to Masimo’s business and Apple is unfairly copying it. Masimo also argues that the U.S. public won’t be harmed if imports of the Apple Watch are halted because the device’s pulse oximetry sensor isn’t “essential to the public health or welfare.”

Read more at Apple Insider.