Optical mice I have seen. What mice used inertia mechanisms to detect movement? It seems far too difficult to make an inertial mechanism smooth and precise enough. --drj
Swedish inventor Håkan Lans is also mentioned as "inventor" of the mouse in some contexts, maybe this should be mentioned?
Believe me, it's not. Engelbart never commercialized the mouse, and essentially has made zero money off of it. He's barely gotten any recognition for his accomplishments, of which the mouse is only an indicative part.--TheCunctator