2 controller adapter for a PlayStation 3 game console so players could use their Guitar Hero guitar controllers that were made for the PlayStation 2 with a PlayStation 3. However, the May 2007 PlayStation 3 V1.80 system update has made the guitar controller compatible with generic PlayStation 2 controller to USB adapters when playing Guitar Hero and Guitar Hero II. In addition, Pelican Accessories has released a special controller adapter that supports both games, including the ability to switch the handedness of the guitar. Litigation Gibson Guitar Corporation, whose guitar likenesses have appeared in the Guitar Hero series from the first game to Guitar Hero Aerosmith, informed Activision on January 7, 2008, that it believed the games infringe its . Gibson claimed that this covers technology that simulates a concert performance via pre-recorded audio and a musical instrument. In response, Activision filed a suit seeking a declaration that it was not in violation of the Gibson patent; Activision also asserted that Gibson had given an implied license by waiting to assert the patent and that the patent was invalid. On March 17, 2008, Gibson sued six retailers (GameStop, Amazon.com, Wal-Mart, Target, Toys "R" Us and Kmart) for selling Guitar Hero products. Subsequently, on March 21, 2008, Gibson also filed a lawsuit against EA, MTV, and Harmonix over their game Rock Band also for violation of its patent, to which a Harmonix spokesperson stated that Gibson's claims are "completely without merit". Activision lawyer Mary Tuck stated in their legal filings that they believe that Gibson initiated the lawsuit due to the fact that "Activision was not [interested] in renewing the License and Marketing Support Agreement" with Gibson Guitars. In February 2009, the United States District Court for the Central District of California ruled against Gibson in their case against Activision, stating that the controllers are not musical instruments but "toys that represent other items", and that Gibson's patent only covers instruments that send out analog signals. Activision and Gibson settled the suit following this ruling. Activision, through John Devecka, owns all of Devecka Enterprises' US and international patents that deal with music games. All patents issued by the USPTO are presumed valid. In February 2010, Activision was sued by the Patent Compliance Group (PCG) for releasing Guitar Hero products with false patent claims, with the PCG asserting that games like Guitar Hero 5 and Band Hero were marked with up to