A system and method of determining price differences between price files which minimizes the possibility that an incorrect price is displayed by an electronic price label (EPL). The system includes a computer which reads the first and second price files, compares the prices for the items in the first...http://www.google.fr/patents/US6044358?utm_source=gb-gplus-shareBrevet US6044358 - System and method of determining price differences between price look-up files
System and method of determining price differences between price look-up files
