John C. Goodwin

EPL Price Verification System and Method

System and method of managing expired products

System and method of managing inventory

Method of displaying information by an electronic price label

Self-service checkout system with RFID capability

Point-of-sale system including isolation layer between client and server software

Method of assigning electronic price labels to groups of price lookup file items

Electronic price label having two dimensional bar code reader

Method of assigning promotional messages to electronic price labels

System and method of tracking short range transmitters