Not content with merely pursuing its patent lawsuit against just Activision, Gibson has named the following companies in its suit:

Activision (Guitar Hero publisher)
Electronic Arts (Rock Band publisher)
Harmonix (Guitar Hero creator and Rock Band developer)
Viacom’s MTV Networks (owner of Harmonix)
Target (retailer)
Wal-Mart Stores (retailer)
Kmart (retailer)
Amazon (online retailer)
Toys R Us (retailer)
GameStop (retailer, owner of GameStop and Electronics Boutique)

“Gibson’s lawsuit is a transparent end run around an impartial court that Activision asked on March 11 to rule on patent assertions that Gibson knows have no merit,” Activision wrote in a statement. “As Activision noted in its filing, Gibson waited three years to make its patent allegations, and only did so after it became clear that Activision was not interested in renewing its marketing and support agreement with Gibson. Activision continues to believe that Gibson’s claims are disingenuous and lack any justification.”

“The defendants have not responded in a timely manner with an intent to enter into negotiations for a patent license agreement,” Gibson said in a statement. “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.”