Apple v Masimo
US Judge Rules Against Apple In Masimo Pulse Oximeter Patent Case
Apple smartwatches could face an import ban after a U.S. judge ruled that the company infringed on one of Masimo's pulse oximeter patents.
Apple to halt some Apple Watch Sales in US
Apple is planning to stop selling some versions of the Apple Watch in the United States as soon as this week to get ahead of what could be one of the most momentous patent disputes in years.
Biden administration upholds Apple Watch ban
US president Joe Biden's administration on Tuesday opted not to veto a government tribunal's ruling to ban imports of Apple Watches.
Apple files emergency motion against Apple Watch ban
Apple filed an emergency motion with a U.S. appeals court to pause a ban on importing and selling some of its Apple Watch models.
U.S. Appeals Court temporarily stops Apple Watch Sales Ban
Apple will be able to sell the latest Apple Watches after an import ban was temporarily stopped by a U.S. appeals court on Wednesday.
Apple Resumes Watch Series 9 and Ultra 2 Sales in U.S.
Apple has started resuming sales of its Apple Watch Series 9 and Ultra 2 in the country.
Apple to Remove Blood-Oxygen Tool From Apple Watches
Apple is planning to remove its blood-oxygen feature from the Apple Watch Series 9 and Apple Watch Ultra 2, to circumvent a US ban of the devices.
Apple Watches Banned again in U.S.
From Jan. 18, Apple will again be banned from selling Apple Watch Series 9 and Ultra 2 devices in the US due to its ongoing patent infringement case with Masimo.
Apple iOS 18.6.1 restores blood oxygen monitoring in the United States
Apple has released iOS 18.6.1 for U.S. iPhones only, bringing a Blood Oxygen monitoring update.
Apple watchOS 11.6.1 restores blood oxygen monitoring in the United States
Apple has released watchOS 11.6.1 in tandem with iOS 18.6.1 bringing a Blood Oxygen monitoring update in the United States.
Masimo sues US Customs over Apple Watch Blood Oxygen feature
Masimo has filed a lawsuit against U.S. Customs and Border Protection (CBP) over the reactivation of the Apple Watch’s Blood Oxygen feature.
US Customs asks court to dismiss Masimo case
Masimo recently filed a lawsuit against U.S. Customs and Border Protection, accusing the agency of improperly allowing Apple to resume selling Apple Watches with the Blood Oxygen feature activated.
US Jury orders Apple to pay Masimo $634M in never ending patent fight
A federal jury in California has found that Apple infringed on a Masimo patent for its pulse oximetry technology and awarded Masimo $634 million in damages.
Apple Watch Blood Oxygen Workaround Doesn’t Infringe on Masimo Patents
U.S. International Trade Commission (ITC) judge has determined that Apple’s current methods of leveraging blood oxygen sensing on Apple Watch do not infringe on Masimo’s patents
Masimo has filed a lawsuit against U.S. Customs and Border Protection (CBP) over the reactivation of the Apple Watch’s Blood Oxygen feature.
The company is now seeking to reinstate the import ban on Apple Watch models that use the feature, claiming that CBP overstepped its authority and violated procedural rules.
Masimo stated:
It has now come to light that CBP thereafter reversed itself without any meaningful justification, without any material change in circumstances, and without any notice to Masimo, let alone an opportunity for Masimo to be heard.
CBP changed its position on Apple’s watch-plus-iPhone redesign through an ex parte proceeding.
The company wants the original ITC import ban reinstated, arguing that each day the new ruling remains in effect causes irreparable harm to its competitive position in the U.S. market.
Masimo also states that CBP’s action nullifies the ITC’s exclusion order, which undermines the legal protection of its patented technology.
Specifically, on August 1, 2025, CBP issued an ex parte ruling permitting Apple to import devices that, when used with iPhones already in the United States, perform the same functionality that the ITC found to infringe Masimo’s patents.
Masimo said that was the first time it learned CBP had quietly reversed course two weeks earlier in an ex parte ruling, despite the agency’s policy that such decisions normally require both sides to be heard.
Masimo only discovered this ruling on Thursday, August 14, 2025, when Apple publicly announced it would be reintroducing the pulse oximetry functionality through a software update.
Masimo asked the Washington court to halt the agency’s ruling and continue to block Apple from selling watches with the blood-oxygen feature.
