Apple Continues Working to Get Blood Oxygen Sensing Back in U.S. Apple Watches as Next Masimo Trial Begins

Apple and Masimo are back in a California court this week for a bench trial that will see Masimo arguing that Apple illegally poached its employees and stole trade secrets when developing the Apple Watch.

masimo watch freedom
Masimo first filed the trade secret lawsuit against Apple in 2020, and there was a jury trial in April 2023. During that trial, the court threw out more than half of Masimo's trade secret claims, but the judge ultimately declared a mistrial because the jury was not able to come to a final decision. Six of seven jurors sided with Apple, while one Masimo holdout would not change her opinion.

Apple and Masimo were slated to retry the case with another jury, but Masimo abandoned all claims asking for monetary compensation in order to get a bench trial instead. Masimo originally requested $1.85 billion in damages, along with reasonable royalties, lost profits, and a penalty for willful trade secret appropriation.

With the bench trial, Masimo is no longer claiming any monetary damages, but it wants an injunction against the Apple Watch. The bench trial will first determine if there were any trade secret violations, and then the court will consider Masimo's argument for an injunction. It is unclear what injunctive relief Masimo could ask for in this situation, especially as many of the claims in this case have now been thrown out.

During the case, Masimo accused Apple of infringing on 17 patents. After an ITC review, 15 of the 17 patents were invalidated, with two remaining. The patent portion of the trade secret case is on hold.

Note that the Masimo trade secret lawsuit against Apple is separate from both an ITC injunction preventing the sale of Apple Watch models with a blood oxygen sensor and a patent infringement case that Apple filed against Masimo.

Apple is appealing the ITC's Apple Watch injunction, but it has been able to continue selling the Apple Watch by disabling the blood oxygen sensor that allegedly infringes on Masimo's technology. To get the sales ban in the first place, Masimo had to prove that it was using the patents that Apple was infringing, so Masimo rushed to create its own smart watch in 2022, deliberately copying several of Apple's patents.

Masimo's W1 Freedom smart watch was the subject of the patent lawsuit that Apple filed against Masimo, and just last week, a jury decided that Masimo's devices had infringed on Apple Watch patents. Apple says that it only asked for $250 in damages, as the goal of the lawsuit wasn't profit, it was to get Masimo to stop copying the design of the Apple Watch.

The ITC order is the most damaging to Apple because Apple is prevented from selling Apple Watch models with blood oxygen sensing in the United States. Apple believes the appeals court will overturn the ITC's ruling, and the company said this week that it is exploring all possible methods to get blood oxygen sensing back in U.S. Apple Watch models.

Over the last five years, Masimo has been fighting three separate cases with Apple. Masimo did win the ITC ban of the blood oxygen sensing feature, but it ultimately had no material impact on Apple's business because Apple was able to simply disable the feature and continue selling the device. So far, Masimo has not gained much in its legal battle with Apple, and it isn't looking like the trade secret case will go in Masimo's favor.

Popular Stories

ios 18 4 carplay

Apple Upgrades CarPlay in Two Ways

Wednesday March 12, 2025 6:05 am PDT by
The upcoming iOS 18.4 update for the iPhone includes a smaller but meaningful improvement for Apple's in-car iPhone mirroring system CarPlay. Specifically, CarPlay now shows a third row of icons, up from two rows previously. However, this change is only visible in vehicles with a larger center display. For example, a MacRumors Forums member noticed the change in a Toyota Tundra with a...
Apple More Personal Siri Ad

John Gruber Says 'Something is Rotten' at Apple

Wednesday March 12, 2025 7:39 pm PDT by
Daring Fireball's John Gruber today shared some strongly-worded comments about Apple's delayed personalized Siri features. Gruber is a well-known Apple pundit who has been writing about the company for more than two decades. In a blog post titled "Something Is Rotten in the State of Cupertino," Gruber said Apple's credibility has been "damaged" by the delay:Keynote by keynote, product by...
airpods pro 2 gradient

AirPods Pro 3 Launch Now Just Months Away: Here's What We Know

Tuesday March 11, 2025 3:26 am PDT by
Despite being released over two years ago, Apple's AirPods Pro 2 continue to dominate the wireless earbud market. However, with the AirPods Pro 3 expected to launch in 2025, anyone thinking of buying Apple's premium earbuds may be wondering if the next generation is worth holding out for. Apart from their audio and noise-canceling performance, which are generally regarded as excellent for...
Apple Maps vs Google Maps Feature

iOS 18.4 Adds a Highly-Requested Setting to iPhones — But Not in U.S.

Wednesday March 12, 2025 1:05 pm PDT by
iPhones are finally getting a much-requested setting, but availability is limited. The upcoming iOS 18.4 update introduces an option to set a default navigation app, other than Apple Maps, but unfortunately this new setting is limited to users in the EU. There, you can now set an app like Google Maps or Waze as your default navigation app on the iPhone by opening the Settings app and tapping ...
iPhone 17 Pro Render Front Page Tech

iPhone 17 Pro Machined Parts Leak Reflects Camera Redesign Rumors

Thursday March 13, 2025 3:07 am PDT by
Apple's upcoming iPhone 17 Pro models are expected to feature a significant design overhaul, and a new image apparently taken on an assembly line for the unreleased devices appears to confirm the biggest rumored change. Render of an iPhone 17 Pro model shared by Jon Prosser The iPhone 17 Pro and iPhone 17 Pro Max are rumored to adopt a horizontal camera bar reminiscent of Google's Pixel...
iphone 17 pro asherdipps

iPhone 17 Pro Max Rumors Allegedly Refer to 'iPhone 17 Ultra' Model

Friday March 14, 2025 7:56 am PDT by
If you've been following iPhone rumors over the last few years, you may remember reading reports that Apple flirted with the idea of introducing a super high-end "Ultra" model that would either replace its Pro Max device or sit above it in Apple's smartphone hirearchy. These reports appeared in the pre-launch iPhone 15 and iPhone 16 rumor cycles, but ultimately came to nothing. Now though, the...
Generic iOS 19 Feature Mock Light

iOS 19 Will Bring Biggest Design Overhaul Since iOS 7

Monday March 10, 2025 12:17 pm PDT by
Apple is planning for a major design overhaul of the iPhone, iPad, and Mac interfaces with the introduction of iOS 19, iPadOS 19, and macOS 16 later this year, reports Bloomberg. The update will "fundamentally change" the look of Apple's operating system, introducing a more consistent cross-platform experience. Apple plans to update the style of icons, menus, apps, windows, and system...
Sad Siri Feature

Kuo: Apple Knows Apple Intelligence is 'Underwhelming' and Won't Drive iPhone Upgrades

Thursday March 13, 2025 9:32 am PDT by
The Apple Intelligence features that Apple introduced with iOS 18 are not pushing people to upgrade their iPhones, Apple analyst Ming-Chi Kuo reiterated today. Apple's recent Siri failures are also going to have an impact on 2025 iPhone shipments, which the market is beginning to realize. As early as last July, Kuo said expectations that Apple Intelligence could drive iPhone upgrades were...
Sad Siri Feature

Kuo: Cook Should Personally Address Siri Apple Intelligence Failure

Thursday March 13, 2025 4:02 pm PDT by
Apple made a major misstep with the way that it handled the delay of Apple Intelligence features for Siri, Apple analyst Ming-Chi Kuo said today. Announcing the delay through a press statement was a bad decision, and Apple should instead have gone through official channels. Kuo referenced the well-known "Antennagate" PR crisis when the iPhone 4 launched in 2010, and the way that then Apple...

Top Rated Comments

Timo_Existencia Avatar
19 weeks ago

"Actions speak louder than words."

Masimo has licensed their tech to countless others. Apple is known for going nuclear. We've seen it with how they work with Qualcomm.
The word is that Kiani was asking an overly ambitious licensing fee...by a lot. Like $100 per watch a lot. It's one thing to say "I'm willing to license" it's entirely another thing to have a reasonable conversation.

Apple has won about 90% of court cases on this matter. And yes, Kiani was essentially kicked out. No need for revisionist history here, it's all been well documented.
Score: 11 Votes (Like | Disagree)
JeffNT326 Avatar
19 weeks ago

So do current US Apple Watch Series 10 devices have the oxygen sensor and it's just software disabled at the moment? Could they enable it via a software update?
This appears to be the case. Tear down videos have confirmed this. Watches sold outside the US have O2 sensors enabled.
Score: 9 Votes (Like | Disagree)
Drs247 Avatar
19 weeks ago
Probably the only functionality ever to have existed in an  product that's available all over of the word but not in the US. Usually happens the other way around.
Score: 8 Votes (Like | Disagree)
TheWraith Avatar
19 weeks ago

Joe Kiani wasn't "kicked out." He resigned as CEO.
Right he resigned...just after the board voted to remove him. So sure, if you want that's a way to technically claim you weren't 'kicked out'...but most normal people would call a spade a spade.
Score: 7 Votes (Like | Disagree)
jz0309 Avatar
19 weeks ago
this is a mess and it seems no party is giving an inch. Too bad that the customer is being punished here and not getting this feature, but then again, it doesn't seem to impact sales much.
Maybe the fact that the previous Masimo CEO was kicked out a couple months ago will make them more open for reasonable licensing fees
Score: 7 Votes (Like | Disagree)
JPack Avatar
19 weeks ago

Do all the other wearables with similar pulse oximeters somehow not violate Masimo’s patents? Or is this an example of Masimo simply going after the biggest fish? Either way, it’s wild that Apple is stuck shipping a hobbled wearable while all its competitors continue to measure blood oxygen with abandon.
Fitbit (Google), Garmin, Philips, and countless others license from Masimo. It's clear Masimo is willing to license their tech. When people suggest Masimo or the CEO wasn't willing to license, it's a random-ass guess with nothing backing it.
Score: 7 Votes (Like | Disagree)