A financial transaction system that does not require the need for cash, checks or credit cards to carry out financial transactions. In return for prepayment of specified sum, a bar coded wristband is issued to a customer. On issuance of the wristband, a data base record is created that is cross-referenced...http://www.google.com/patents/US6474557?utm_source=gb-gplus-sharePatent US6474557 - Prepayment wristband and computer debit system
