A gaming system including a central server linked to a plurality of gaming machines. The central server includes a plurality of progressive modules. Each progressive module maintains one or more progressive awards and is associated with zero, one or more of the gaming machines in the gaming system. Upon...http://www.google.com.tw/patents/US20070191088?utm_source=gb-gplus-share專利 US20070191088 - SERVER BASED GAMING SYSTEM HAVING MULTIPLE PROGRESSIVE AWARDS
