Activision is being sued for false patent claims on its music games.  As reported in Gamasutra, a non-government affiliated group called the Patent Compliance Group has filed suit against the publisher claiming that it used false patent numbers and patent pending claims on its Hero line of products.  The group said Activision titles Guitar Hero 5, Band Hero, Guitar Hero Smash Hits, and DJ Hero are labeled with patent numbers that don’t cover the products, and that some have patent pending or patent applied for claims that are inaccurate.  The suit asks for $500 for each unit of product sold that falls under the claim, of which the group says half would go to the U.S. Government.  Gamasutra says Patent Compliance Group has been filing patent infringement suits in Texas against other companies using qui tam, a legal action where citizens can sue on behalf of the government and reap any money awarded.  Read more at Gamasutra.