Defining who "really" invented something is often tricky. For example I mentioned in the article that there is some dispute about who discovered backpropagation. A

According to Wikipedia, Nvidia released its first product, the RV1, in November 1995, the same month 3dfx released its first Voodoo Graphics 3D chip. Is there reason to think the 3dfx card was more of a "true" GPU than the RV1? If not, I'd say Nvidia has as good a claim to inventing the GPU as 3dfx does.