A federal jury in California ruled Friday that Apple must pay medical device maker Masimo $634 million for infringing a patent on blood oxygen monitoring technology.

Reuters reports that the jury found that the Apple Watch’s workout mode and heart rate notification features violated Masimo’s patent.

“This is a significant win in our ongoing efforts to protect our innovations and intellectual property, which is crucial to our ability to develop technology that benefits patients,” Masimo said in a statement . “We remain committed to defending our IP rights moving forward.”

An Apple spokesperson told Reuters that the company plans to appeal the verdict, adding, “The single patent in this case expired in 2022, and is specific to historic patient monitoring technology from decades ago.”

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