Methods and apparatus consistent with the present invention provide additional services, such as cashless gaming and player tracking, at a gaming machine. One such gaming machine includes a game processor, a peripheral device, and a linking component connected between the game processor and the peripheral...http://www.google.de/patents/US8016666?utm_source=gb-gplus-sharePatent US8016666 - Linking component, system, and method for providing additional services at a gaming machine
