A collective payment and control system has a variety of self-service devices that dispense different types of goods. The system has a primary dispenser such as a self-service fuel pump and a secondary dispenser such as a self-service vending machine. A customer enters a charge card into one of the dispensers,...http://www.google.com/patents/US6527176?utm_source=gb-gplus-sharePatent US6527176 - Collective payment and control system
