MGT Capital Investments (MGT) announced its majority-owned subsidiary, MGT Gaming, has filed a lawsuit claiming patent infringement against multiple companies believed to be violating MGT Gaming's United States Patent No. 7,892,088 entitled "Gaming Device Having a Second Separate Bonusing Event." The '088 Patent is directed to a gaming system in which a second game played on an interactive sign is triggered once specific events occur in a first game. The lawsuit, which was filed in the United States District Court for the Southern District of Mississippi (Jackson Division), alleges the defendants Caesars Entertainment (CZR), MGM Resorts International (MGM), WMS Gaming - a subsidiary of WMS Industries (WMS), Penn National Gaming (PENN), and Aruze Gaming America, either manufacture, sell or lease gaming systems in violation of MGT Gaming's patent rights, or operate casinos that offer gaming systems in violation of MGT Gaming's patent rights. The U. S. Patent and Trademark Office issued the '088 Patent in February 2011. The corresponding patent application was filed in October 2001. The entire right, title and interest in the '088 patent, and all filed continuation patents, is owned by MGT Gaming, including the right to recover for past damages for any infringement of the patent.