A price maintenance system and method in which price information entered into or read from a price-lookup file is shared to avoid price mismatch. The price-lookup file and price changes to the price-lookup file are shared by a point-of-service system including a bar code scanner, and a routine for printing...http://www.google.ca/patents/US6256615?utm_source=gb-gplus-sharePatent US6256615 - Method of assigning electronic shelf labels to price lookup file items
