An electronic price label (EPL) support method in which support of an EPL system may be provided by a main computer in a store, a host computer coupled to the main computer and other main computers in a chain of stores, or a combination of both. The support method includes a method of modifying...http://www.google.com.au/patents/US5797131?utm_source=gb-gplus-sharePatent US5797131 - Electronic price label support method
