Gibson Guitar is apparently on some litigation warpath. Not only did the guitar maker sue Activision and major retailers that carry Guitar Hero products, but now Gibson is apparently going after original Guitar Hero developer Harmonix, its parent company MTV Networks and publisher/distributor EA because Rock Band allegedly infringes upon the same Gibson patent mentioned in the Guitar Hero suit – pertaining to "technology used to simulate a musical performance."

"Gibson Guitar had made good faith efforts to enter into a patent license agreement with the defendants in this case. The defendants have not responded in a timely manner with an intent to enter into negotiations for a patent license agreement. Gibson Guitar had no alternative but to bring the suit, and it will continue to protect its intellectual property rights against any and all infringing persons," the company said in a terse release.