The present invention provides various modules for use with gaming machines. One such module is configured to receive data from a portable memory device and/or from a network device, e.g., from a game server. In some embodiments, the module includes, or is disposed within, a player tracking unit. Some...http://www.google.de/patents/US20060046855?utm_source=gb-gplus-sharePatent US20060046855 - Module for a gaming machine
