To be fair they were going to license the tech but instead hired employees of the company whose tech they said they were interested in buying. Allegedly. It is quite often just worth going to court and settling rather than paying extortionate fees forever. It’s very unlikely at Apple’s scale a court will give them a percentage of sale price of an Apple Watch as the headline number would just be too large.

That's now, at some point at in the past their lawyers probably said It's all going to be fine, put the sensor and make it a main feature of the product.