Supercomputer maker Silicon Graphics (SGI) has filed a patent infringement lawsuit against ATI Technologies. The suit, filed in the US District Court in the Western District of Wisconsin, US, asserts that products in ATI’s line of Radeon graphics processors infringe SGI patented technology. The complaint seeks unspecified damages and a court ordered injunction against future infringement by ATI. “The company’s technology covered by the ‘327 patent is an important resource in achieving enhanced graphics processing demanded by today’s computer systems,” said Dennis McKenna, CEO of SGI, in a statement. “SGI has licensed this technology to ATI’s major competitors and, as I have previously been stating publicly, SGI intends to aggressively protect and enforce its IP."