A gaming machine comprises at least one visual display (mechanical or video) and a game of chance controlled by a processor in response to a wager. The game of chance includes a primary game and a sorting feature. The sorting feature is triggered by certain start-feature outcomes of the primary game....http://www.google.es/patents/US20060252492?utm_source=gb-gplus-sharePatente US20060252492 - Gaming machine with sorting feature