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Comments close on FDA's generative AI device framework Solventum clears its Restrata matrix for use under V.A.C. negative pressure therapy Medtronic takes a CE mark for five conduction system pacing pacemakers Paradromics hands Siemens Healthineers the imaging workup for its brain implant Empyrean submits a 510(k) for Vektra, its robotic brachytherapy system Masimo clears AFib detection on the Radius VSM wearable monitor Sequel clears the twiist insulin pump for adults with type 2 diabetes FTC issues a second request on the MiMedx purchase of Sanara MedTech Labcorp pays $722M upfront for BioReference testing assets Comments close on FDA's generative AI device framework Solventum clears its Restrata matrix for use under V.A.C. negative pressure therapy Medtronic takes a CE mark for five conduction system pacing pacemakers Paradromics hands Siemens Healthineers the imaging workup for its brain implant Empyrean submits a 510(k) for Vektra, its robotic brachytherapy system Masimo clears AFib detection on the Radius VSM wearable monitor Sequel clears the twiist insulin pump for adults with type 2 diabetes FTC issues a second request on the MiMedx purchase of Sanara MedTech Labcorp pays $722M upfront for BioReference testing assets

Patent ruling

Apple owes Masimo $818.5M after a judge adds $184.2M in interest

MedDevice Startups Staff · Oct 5 · 2 min read · Via MedTech Dive

A judge in the Central District of California ordered Apple to pay Masimo $184.2 million in prejudgment interest on October 5. That takes the total to $818.5 million, on top of the $634 million a jury awarded in November 2025 over a pulse oximetry patent.

Masimo asked for the 7 percent rate in the California Constitution, worth $242.7 million. Apple proposed $114.5 million and called the interest a windfall. The judge used Masimo's own cost of borrowing, compounded annually. Apple also owes 4 percent postjudgment interest on the full amount from July 20 until it pays, a point it did not contest, and says it will appeal.

Any wearable reporting SpO2 ships into this fight. Masimo has asserted more than 25 patents against Apple over six years, and the claim that landed covered the sensor rather than the algorithm. For a startup putting an optical sensor against skin, that puts freedom to operate in the hardware review and not in the software release notes.

Questions & Answers

How much does Apple owe Masimo in the pulse oximetry patent case?

Apple owes Masimo $818.5 million, made up of a $634 million jury verdict from November 2025 and $184.2 million in prejudgment interest ordered on October 5, 2026. Apple also owes 4 percent postjudgment interest from July 20 until the judgment is paid.

What patent did Apple infringe in the Masimo case?

A jury found that Apple infringed a Masimo pulse oximetry patent covering blood oxygen sensing used in the Apple Watch. Apple says the patent expired in 2022 and has said it will appeal.

What interest rate did the court apply in Masimo v. Apple?

The judge rejected Masimo's request for the 7 percent California constitutional rate, which would have produced $242.7 million, and rejected Apple's $114.5 million proposal. The court used Masimo's own cost of borrowing compounded annually, yielding $184.2 million.

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