A method for providing incentive to players of networked slot machines includes a card reader associated with each machine and a card associated with each player. A player account accessible by a host computer on the network is created which associates the player's card with the account. A predetermined...http://www.google.de/patents/US20020042300?utm_source=gb-gplus-sharePatent US20020042300 - METHOD FOR PROVIDING INCENTIVE TO PLAY GAMING DEVICES CONNECTED BY A NETWORK TO A HOST COMPUTER 
