Graphics chipmaker Nvidia is suing competitor 3dfx for patent infringement. The suit, filed in a Northern California district court, involves five Nvidia patents that the company believes have been infringed upon by 3dfx products. Nvidia is asking for an injunction to prevent 3dfx from selling it Voodoo 3, Voodoo 4, and Voodoo 5 product lines, and is also seeking monetary damages. "We have always been on the forefront of innovation in 3D graphics technology and visual computing," said Nvidia CEO Jen-Hsun Huang, "This innovation is achieved through the annual investment of hundreds of millions of dollars in research and development. We cannot allow the fruits of this investment to be misappropriated."