Apple's Trade Secret Battle With Masimo Over Pulse Oximetry Technology Ends in Mistrial - MacRumors
Skip to Content

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

apple watch series 6 blood oxygen monitoring 1

Apple's $634 Million Apple Watch Patent Bill Just Got Even Bigger

Tuesday October 6, 2026 6:09 am PDT by
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. Judge James Selna ...
Taptic Engine iPhone 6s

Apple Could Owe Even More After $5.7 Billion Patent Verdict

Tuesday October 20, 2026 8:24 pm PDT by
Apple could face additional payments on top of a $5.7 billion patent verdict, with Taction Technology asking a federal judge for more damages, interest, and royalties on future iPhone and Apple Watch sales. The request follows a September jury verdict that Apple's Taptic Engine infringed two Taction patents covering haptic feedback, the technology that produces taps and vibrations in...
iPhone Duo Display Cracking

Apple Alerts Stores to iPhone Duo's Display Cracking Issue

Friday October 30, 2026 3:20 pm PDT by
In a memo shared with Apple Stores and Apple Authorized Service Providers this week, and later obtained by MacRumors, Apple provided technicians with guidance on how to diagnose and address the iPhone Duo's inner display cracking issue. If a customer reports the issue, Apple advised technicians to inspect the iPhone Duo and repair or replace it in accordance with their standard procedures....

Top Rated Comments

appleguy123 Avatar
46 months ago
A win for the lawyers on both sides
Score: 19 Votes (Like | Disagree)
46 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)
antiprotest Avatar
46 months ago
That's the Android user.
Score: 12 Votes (Like | Disagree)
46 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)
RalfTheDog Avatar
46 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)
46 months ago

That's the Android user.
User wanted 16 GB base model. He wanted to punish apple.
Score: 9 Votes (Like | Disagree)
Latest Stories
Nearly Every M5 MacBook Air Now $200 Off on Amazon
Nearly Every M5 MacBook Air Now $200 Off on Amazon
10 hours ago
Apple's HomeView Ships With Six-Month-Old Software
Apple's HomeView Ships With Six-Month-Old Software
12 hours ago
Three New iPads Rumored to Launch in First Half of 2027
Three New iPads Rumored to Launch in First Half of 2027
13 hours ago
Apple Offers Steps to Fix Daylight Saving Time Bug on Apple Watch
Apple Offers Steps to Fix Daylight Saving Time Bug on Apple Watch
16 hours ago
Apple Watch Ultra 4 Hits All-Time Low Price With Amazon's $99 Discount
Apple Watch Ultra 4 Hits All-Time Low Price With Amazon's $99 Discount
1 day ago
Reminder: Apple's Big Discount on Beats 360 Ear Cushions Ends Today
Reminder: Apple's Big Discount on Beats 360 Ear Cushions Ends Today
1 day ago
Here's a New Tour of Apple's HomeView Software
Here's a New Tour of Apple's HomeView Software
1 day ago
Apple Reveals New iPad Mini's Battery Capacity
Apple Reveals New iPad Mini's Battery Capacity
2 days ago
Top Stories: Apple's Big MacBook Pro, iPad mini and iMac Updates
Top Stories: Apple's Big MacBook Pro, iPad mini and iMac Updates
2 days ago
'Pluribus' Season 2 Reportedly Starts Production Today
'Pluribus' Season 2 Reportedly Starts Production Today
2 days ago
iPhone 18 Pro Sales Surge in China, Offsetting Decline in U.S. and Japan
iPhone 18 Pro Sales Surge in China, Offsetting Decline in U.S. and Japan
2 days ago
HomeView Software 27.2: Wallpapers, Control Center, and More
HomeView Software 27.2: Wallpapers, Control Center, and More
2 days ago
Apple Alerts Stores to iPhone Duo's Display Cracking Issue
Apple Alerts Stores to iPhone Duo's Display Cracking Issue
2 days ago
iOS 27.3 Will Enable These Apple Intelligence Features in China
iOS 27.3 Will Enable These Apple Intelligence Features in China
2 days ago
Apple Says iOS 27.3 Beta Coming Next Week
Apple Says iOS 27.3 Beta Coming Next Week
2 days ago
Apple's Flash Storage Suppliers Are Finally 'Getting Their Revenge'
Apple's Flash Storage Suppliers Are Finally 'Getting Their Revenge'
2 days ago
14 New Things Your iPhone Can Do in iOS 27.2
14 New Things Your iPhone Can Do in iOS 27.2
2 days ago
iPhone Duo Review: One Week Later
iPhone Duo Review: One Week Later
2 days ago
Samsung Mocks iPhone Duo Display Cracks in New Ad Campaign
Samsung Mocks iPhone Duo Display Cracks in New Ad Campaign
2 days ago
The MacRumors Show: OLED MacBook Pro, iPad Mini 8, and More
The MacRumors Show: OLED MacBook Pro, iPad Mini 8, and More
2 days ago
MacBook Pro With Touch Display: 15 More Details Revealed
MacBook Pro With Touch Display: 15 More Details Revealed
2 days ago
Russia Places Apple on State Surveillance Registry
Russia Places Apple on State Surveillance Registry
3 days ago
Halloween Weekend Brings Discounts on Apple Accessories and Pre-Orders
Halloween Weekend Brings Discounts on Apple Accessories and Pre-Orders
3 days ago
Apple Has Released More Than 25 New Products in the Past Two Months
Apple Has Released More Than 25 New Products in the Past Two Months
3 days ago
Local Code Launches as Free, Private AI Assistant Tool for Mac
Local Code Launches as Free, Private AI Assistant Tool for Mac
3 days ago
Apple Acquires Ascend.io
Apple Acquires Ascend.io
3 days ago
HomePod Mini 2 Launches Today: All the New Features
HomePod Mini 2 Launches Today: All the New Features
3 days ago
AirTag 2 4-Pack Drops to New Low Price of $69.99
AirTag 2 4-Pack Drops to New Low Price of $69.99
3 days ago
Rian Johnson's iPhone Camera App Goes Viral
Rian Johnson's iPhone Camera App Goes Viral
3 days ago
Where Did All the iPhone Duos Go? Mostly to Apple's Stores
Where Did All the iPhone Duos Go? Mostly to Apple's Stores
3 days ago