'Guitar Hero' maker files patent suit has the almost inevitable litigious follow-up to Gibson's lawsuit claiming they own patents to a game like Guitar Hero (story). Word is: "Activision, in a complaint filed Tuesday in federal court in Los Angeles, seeks court orders that it doesn't infringe the technology and that the Gibson patent isn't valid." Techdirt (thanks Mike Martinez) has a story about this, and after examining Gibson's patent, concurs with Activision that several aspects of Gibson's patent do not seem applicable to the Guitar Hero games, which cover participating in a virtual concert using a real guitar and a 3D headset.