An electronic personal shopping system for communicating between a customer's personal memory store and point-of-sale terminals in a retail facility. Demographic profile data, a customer's transaction history data and a customer's current incentive indicia are stored in particular locations in a memory...http://www.google.com/patents/US6129274?utm_source=gb-gplus-sharePatent US6129274 - System and method for updating shopping transaction history using electronic personal digital shopping assistant
