Vertical integration leveraging perhaps only a single patent can certainly be illegal. Market does not mean "entire product category" in law, (but enforcement h

Vertical integration leveraging perhaps only a single patent can certainly be illegal. Market does not mean "entire product category" in law, (but enforcement has been so weak in recent decades that's been the case de facto.) https://en.wikipedia.org/wiki/Motion_Picture_Patents_Co._v._Universal_Film_Manufacturing_Co https://en.wikipedia.org/wiki/Motion_Picture_Patents_Co._v._....