Masimo sues US Customs over Apple Watch blood oxygen workaround<div class="feat-image">

</div><p>Last week, when Apple announced the release of a “
redesigned Blood Oxygen feature” to the Apple Watch, many figured Masimo (who had been suing Apple over patents related to the feature), would look for a way to fight back. Today, the company did just that and filed a new lawsuit. But this time, it’s against the US Customs and Border Protection. Here’s why.</p>
<a data-layer-pagetype="post" data-layer-postcategory="apple-watch" data-layer-viewtype="unknown" data-post-id="1015106" href="
https://9to5mac.com/2025/08/20/masimo-sues-us-customs-over-apple-watch-blood-oxygen-workaround/#more-1015106" class="more-link">more
Masimo sues US Customs over Apple Watch blood oxygen workaround