| http://www.w3.org/ns/prov#value | - Further disclosed are gaming machines that have the ability to fully transact using vouchers, including the ability to read, write, encrypt, and...http://www.google.co.uk/patents/US6652380?utm_source=gb-gplus-sharePatent US6652380 - Cashless gaming system and methodAdvanced Patent SearchPublication numberUS6652380 B1Publication typeGrantApplication numberUS 09/454,903Publication date25 Nov 2003Fil
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