A replacement device for a conventional bill acceptor in a gaming machine, located in the same space as the bill acceptor, has a bill acceptor or voucher reader/printer, plus at least a fingerprint reader. In one preferred embodiment, the new device has a bill acceptor, fingerprint reader, magnetic strip...http://www.google.ca/patents/US7247098?utm_source=gb-gplus-sharePatent US7247098 - Combination fingerprint reader and I/O devices for gaming machines
