A federal jury in California said on Friday that Apple owes medical-monitoring technology company Masimo $634 million for infringing a patent covering blood-oxygen reading technology.

The jury agreed with Masimo that the Apple Watch's workout mode and heart rate notification features violated Masimo's patent rights, a Masimo spokesperson confirmed.

"Over the past six years (Masimo has) sued Apple in multiple courts and asserted over 25 patents, the majority of which have been found to be invalid," the spokesperson said. "The single patent in this case expired in 2022, and is specific to historic patient monitoring technology from decades ago."

Masimo, in a statement, called the verdict "a significant win in our ongoing efforts to protect our innovations and intellectual property."

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