https://www.tomsguide.com/wellness/smartwatches/apple-watch-...

> This week, the US Court of Appeals for the Federal Circuit upheld the previous verdict of the Patent Trial and Appeal Board that concluded all three of AliveCor’s patents were unpatentable. This is generally the outcome when courts conclude that patents are either obvious or too generic to enforce.

The case over the oximeter functionality is still ongoing, but with luck it'll go the same way.