After receiving a letter accusing them of patent infringement, Activision filed a declaratory judgment action March 12, 2008, against Gibson Guitars, asking the court for finding of invalidity and noninfringement. Gibson is asserting that it has a patent on a musical performance simulation, which Gibson alleges Activision infringes via its popular Guitar Hero games. The lawsuit was filed in the Central District of California . The patent is U.S. Pat. No. 5,990,405, entitled System and Method... read more
