Apple’s Masimo patent bill reaches €750 million after €169 million interest award
A US federal judge has ordered Apple to pay Masimo about €169 million in interest on a €584 million patent award, bringing the total to roughly €753 million. The case concerns past Apple Watch sales: the patent expired in 2022, and Apple says it plans to appeal.
Bottom line — Apple’s total is about €753 million, with further interest accruing until the judgment is paid.
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Bloomberg Law reported that Judge James V. Selna rejected Apple’s argument that interest would give Masimo a windfall, saying it compensates for royalties withheld during the infringement period.
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The court used Masimo’s borrowing rate, compounded annually; Masimo had sought 7%, which would have meant about €223 million in interest, according to MedTechDive.
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MedTechDive reported that Apple must also pay 4% post-judgment interest on the total, starting on 20 July and continuing until payment.
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The November 2025 jury verdict found that Apple Watch heart-rate notifications and workout features infringed Masimo’s low-power pulse-oximetry patent, according to Bloomberg Law.
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The ruling is separate from the US import dispute over blood-oxygen measurement; the current order does not affect features on current Apple Watch models, according to MacRumors.
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Apple’s appeal is continuing, MalaysianWireless reported.