Apple's Trade Secret Battle With Masimo Over Pulse Oximetry Technology Ends in Mistrial

The latest legal dispute between Apple and pulse oximetry company Masimo today ended in a mistrial, reports Bloomberg. The jury overseeing the case was not able to come to a final decision in its deliberations, causing U.S. district judge James Selna to declare a mistrial.

apple watch ultra purple
Six jurors wanted to decide in favor of Apple, but one juror held strong for Masimo, leading to an impasse. Earlier this afternoon, the jurors sent the judge a note asking what to do because the juror voting in favor of Masimo would not change her position.

The judge initially planned to send the jurors home for the night with deliberations to continue on Tuesday, but after they insisted they would not be able to come to a consensus, he opted to call it.

Apple and Masimo have been in court over the last few weeks to determine whether Apple illegally poached Masimo employees and stole trade secrets when developing the Apple Watch. Masimo was seeking over $1.8 billion in damages and co-ownership of five Apple pulse oximetry patents that Masimo said used its technology.

Apple in July 2013 hired Chief Medical Officer Michael O'Reilly and then in 2014, it hired Cercacor Chief Technical Officer Marcelo Lamego (Cercacor is a Masimo spinoff company). Masimo claims that the two former employees inappropriately shared Masimo's intellectual property when they developed the Apple Watch, which Apple denies.

During the trial, Masimo attempted to demonstrate that Apple Watch development was floundering prior to the hiring of the two Masimo employees, pointing to a 2013 email where now-retired Apple executive Bob Mansfield called the Apple Watch "a mess" and said the sensor would "fail" on its "current path."

Apple maintained that no Masimo IP was used in its work on the Apple Watch, and further, that what Masimo claims are "trade secrets" are ideas "long known and used by multiple companies." Apple said that Masimo targeted it because Masimo saw the success of Apple Watch and wanted to make its own smart watch. Masimo did indeed come out with an Apple Watch-like wearable in late 2022 after decades of focus on large medical devices for healthcare.

In a statement to MacRumors, Apple said that it plans to ask the court to dismiss the trade secret allegations. For context, five of Masimo's claims against Apple were thrown out during the trial, reducing Masimo's self-calculated award.

"We thank the jury for their careful consideration in this case. We deeply respect intellectual property and innovation and do not take or use confidential information from other companies. We are pleased that the court correctly rejected half of the plaintiffs’ trade secret allegations, and will now ask the court to dismiss the remaining claims."

Masimo said that it plans to continue pursuing the trade theft case.

"While we are disappointed that the jury was unable to reach a verdict, we intend to retry the case and continue to pursue legal redress against Apple. As we begin that process, the United States Trade Commission is scheduled in the coming months to decide whether to ban the importation of certain models of the Apple Watch, following a ruling last year by an Administrative Law Judge that Apple infringed one of Masimo’s patents for pulse oximetry."

Masimo previously sued Apple for patent infringement, but the U.S. Patent and Trademark Office ended up invalidating all but two of the patents. The United States International Trade Commission in January said that Apple had infringed on a Masimo patent, a case that is still ongoing.

Popular Stories

AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 2, AirPods Pro 3, and AirPods 4

Thursday November 13, 2025 11:35 am PST by
Apple today released new firmware designed for the AirPods Pro 3, the AirPods 4, and the prior-generation AirPods Pro 2. The AirPods Pro 3 firmware is 8B25, while the AirPods Pro 2 and AirPods 4 firmware is 8B21, all up from the prior 8A358 firmware released in October. There's no word on what's include in the updated firmware, but the AirPods Pro 2, AirPods 4 with ANC, and AirPods Pro 3...
iOS 26

iOS 26.2 Available Next Month With These 8 New Features

Tuesday November 11, 2025 9:48 am PST by
Apple released the first iOS 26.2 beta last week. The upcoming update includes a handful of new features and changes on the iPhone, including a new Liquid Glass slider for the Lock Screen's clock, offline lyrics in Apple Music, and more. In a recent press release, Apple confirmed that iOS 26.2 will be released to all users in December, but it did not provide a specific release date....
CarPlay Pinned Messages

iOS 26.2 Adds New CarPlay Setting

Thursday November 13, 2025 6:48 am PST by
iOS 26 extended pinned conversations in the Messages app to CarPlay, for quick access to your most frequent chats. However, some drivers may prefer the classic view with a list of individual conversations only, and Apple now lets users choose. Apple released the second beta of iOS 26.2 this week, and it introduces a new CarPlay setting for turning off pinned conversations in the Messages...
homepod mini thumb feature

New HomePod Mini, Apple TV, and AirTag Were Expected This Year — Where Are They?

Wednesday November 12, 2025 11:42 am PST by
While it was rumored that Apple planned to release new versions of the HomePod mini, Apple TV, and AirTag this year, it is no longer clear if that will still happen. Back in January, Bloomberg's Mark Gurman said Apple planned to release new HomePod mini and Apple TV models "toward the end of the year," while he at one point expected a new AirTag to launch "around the middle of 2025." Yet,...
ios 26 digital id passport wallet

Apple Announces Launch of U.S. Passport Feature in iPhone's Wallet App

Wednesday November 12, 2025 9:15 am PST by
Apple today announced that iPhone users can now create a Digital ID in the Apple Wallet app based on information from their U.S. passport. To create and present a Digital ID based on a U.S. passport, you need: An iPhone 11 or later running iOS 26.1 or later, or an Apple Watch Series 6 or later running watchOS 26.1 or later Face ID or Touch ID and Bluetooth turned on An Apple Account ...
Tesla Charging

Tesla Working to Add Apple CarPlay Support to Vehicles

Thursday November 13, 2025 8:31 am PST by
Tesla is working to add support for Apple CarPlay in its vehicles, Bloomberg's Mark Gurman reports. Tesla vehicles rely on its own infotainment software system, which integrates vehicle functions, navigation, music, web browsing, and more. The automaker has been an outlier in foregoing support for Apple CarPlay, which has otherwise become an industry standard feature, allowing users to...
m1 chip slide

Five Years of Apple Silicon: M1 to M5 Performance Comparison

Monday November 10, 2025 1:08 pm PST by
Today marks the fifth anniversary of the Apple silicon chip that replaced Intel chips in Apple's Mac lineup. The first Apple silicon chip, the M1, was unveiled on November 10, 2020. The M1 debuted in the MacBook Air, Mac mini, and 13-inch MacBook Pro. The M1 chip was impressive when it launched, featuring the "world's fastest CPU core" and industry-leading performance per watt, and it's only ...
iOS 26

Everything New in iOS 26.2 Beta 2

Wednesday November 12, 2025 3:29 pm PST by
Apple today provided developers with the second beta of iOS 26.2, which adds a few new features worth knowing about. Measure App Apple's Measure app now features a Liquid Glass design for the level, with two Liquid Glass bubbles instead of white circles. Games App There's now an option to sort games in the Games app Library by size, in addition to Name and Recent. CarPlay The...
tvOS 26 Profiles

tvOS 26.2 Adds a Useful New Feature to Your Apple TV

Friday November 14, 2025 10:02 am PST by
Starting with the upcoming tvOS 26.2 update, currently in beta, additional profiles created on the Apple TV no longer require their own Apple Account. In the Settings app on the Apple TV, under Profiles and Accounts, anyone can create a new profile by simply entering a name and indicating whether the profile is for a kid. The profile will be associated with the primary user's Apple Account,...
apple intelligence erroneous support list

Apple Intelligence Apparently Too Smart for M1 Macs After Listing Error

Wednesday November 12, 2025 2:49 am PST by
Update: It took a day, but Apple has now corrected its Apple Intelligence device compatibility list to show support for the earliest Apple silicon Macs. The original article follows. Apple's website is causing some confusion among Mac owners, and for good reason – its device compatibility listing for Apple Intelligence appears to have dropped support for M1 Macs. The U.S. version...

Top Rated Comments

appleguy123 Avatar
33 months ago
A win for the lawyers on both sides
Score: 19 Votes (Like | Disagree)
steve09090 Avatar
33 months ago

"We thank the jury for their careful consideration in this case. We deeply respect intellectual property and innovation and do not take or use confidential information from other companies...."

Rofl. This from a company built on theft....
do you not know the history of Android?
Score: 14 Votes (Like | Disagree)
neutrino17 Avatar
33 months ago

Sounds like one juror might have some Apple stock... doesn't make sense when it's swayed that much.
The other way around. One juror was a hold-out against Apple.
Score: 12 Votes (Like | Disagree)
antiprotest Avatar
33 months ago
That's the Android user.
Score: 12 Votes (Like | Disagree)
RalfTheDog Avatar
33 months ago
Let me tell you guys the truth about all of this. I have no idea who was right. With all respect to MacRumors, reading a few stories on the internet is not enough to form a valid opinion.
Score: 10 Votes (Like | Disagree)
TechnoMonk Avatar
33 months ago

That's the Android user.
User wanted 16 GB base model. He wanted to punish apple.
Score: 9 Votes (Like | Disagree)