Apple Watch’s heart rate sensor is built on stolen tech — that’s what a lawsuit filed against the company is claiming, at least. A Michigan-based health startup called Omni MedSci is accusing Cupertino of using technology on the Watch that infringes on four of its patents, all of which reference the use of a light source on a wearable device to take blood measurements. In his lawsuit, Omni founder Dr. Mohammed N. Islam said he met with Apple’s medical technology specialist, hardware designer and even VP of product marketing Greg Joswiak several times from 2014 to 2016 to discuss what were then merely patent applications.