Yes, and for example 3dfx's patents for the original Voodoo architecture expired a few years ago. But a fixed-function graphics pipeline is not terribly useful these days.
Technology moves so fast that perhaps tech patents should be given shorter terms. As it stands, the big companies just build up huge patent portfolios which discourage competition.
Technology moves so fast that perhaps tech patents should be given shorter terms. As it stands, the big companies just build up huge patent portfolios which discourage competition.