Some time ago, Nvidia filed a class action law suit against Samsung for, eh, basically inventing the (modern 3D) GPU and using it without their permission. Samsung naturally responded by filling a counter suit against Nvidia and in no time, it had turned into a (not so) good natured patent brawl.

Nvidia Did Not Invent The (Modern) GPU – ITC Court Rules In Samsung’s Favor, All Three Patents Tossed