Every Apple Watch except the very first model can alert wearers to potential irregular rhythms in their heart rates and the feature has become something of a cornerstone of the Apple Watch’s appeal. The device has grown from a glorified notification wearable to something of a premium fitness and health device with great success.

Wiesel, who claims Apple has “refused to negotiate in good faith to avoid this lawsuit” teaches at NYU School of Medicine and first raised his concerns with Apple directly in 2017. He is asking for royalties or for the court to block Apple using his claimed invention at all.

It’ll be interesting to see what the ruling is, as Apple has long been lauded a pioneer in many areas, but it has come as something of a surprise that it has managed to potentially pioneer heart health technology.

Then again, it isn’t short of cash and can hire pretty much anyone – sometimes it’s the company’s secrecy that leads to accusations of patent infringement such as this.