Apple needs to pay an extra $184 million in Apple Watch patent infringement case

Apple received some bad news today. The company has been ordered to pay an additional $184 million in interest on top of a jury’s previous $634 million verdict in a patent infringement case with Masimo. The initial verdict came out in November of last year, when a jury found that Apple infringed upon Masimo’s patents related to the use of heart-rate monitoring features in its Apple Watches.

Masimo was then awarded $634 million in damages. Now, judge James Selna rejected Apple’s argument that adding interest would constitute a windfall for Masimo, citing US Supreme Court guidance… Apple needs to pay an extra $184 million in Apple Watch patent infringement case.

Apple needs to pay an extra $184 million in Apple Watch patent infringement case – com news ADVERTISEMENT Apple needs to pay an extra $184 million in Apple Watch patent infringement case Post your comment Comments (6) Vlad 05 October 2026 Apple watchOS Smart wearables Apple received some bad news today. Now, judge James Selna rejected Apple’s argument that adding interest would constitute a windfall for Masimo, citing US Supreme Court guidance that "interest from the time that the royalty payments would have been received merely serves to make the patent owner whole". At the same time, the judge also declined Masimo’s request for a 7% interest rate, which would have resulted in a $243 million interest payment from Apple.

Apple’s $634 million patent loss to medical technology company Masimo has just gotten even bigger, after a federal judge ordered Apple to pay an additional $184 million in interest on what it owes (via Bloomberg Law). The ruling takes Apple’s bill to around $818 million, but that doesn’t include any post-judgment interest continuing to accrue until the judgment is paid.

It didn’t all go Masimo’s way, though. Selna also declined Masimo’s request to calculate it at a 7 percent rate, which would have put Apple’s interest bill at $243 million.

Instead, the court used Masimo’s own borrowing rate, compounding annually from when the infringement began. Masimo is also behind the separate patent dispute that led to a U.S.

Import ban on certain Apple Watch models and resulted in Apple disabling blood oxygen functionality on affected newly sold models. Apple in 2025 introduced a redesigned version of the feature.

The dispute here is concerned with a Masimo pulse-oximetry patent. In November 2025, a jury found that Apple Watch features including heart-rate notifications infringed Masimo’s patent and awarded the company $634 million.

Apple later tried to overturn or reduce the award, but Selna upheld the verdict in July. The patent in question expired in June 2022, so the ruling related to historical Apple Watch sales and has no effect on the heart-rate features in current Apple Watch models.

Related Roundup: Apple Watch 12 Tags: Apple Lawsuits, Masimo Buyer’s Guide: Apple Watch (Buy Now) Related Forum: Apple Watch This article, " Apple’s $634 Million Apple Watch Patent Bill Just Got Even Bigger " first appeared on com Discuss this article in our forums. Apple’s $634 Million Apple Watch Patent Bill Just Got Even Bigger.

So what was a $634 million bill for Apple has now become an $818 million bill instead.