In an electronic cash register mutual transmission system, a plurality of electronic cash registers each having a memory for storing total data are electrically connected to each other. A search is made to confirm whether the classified sales data storage area is present in the memory of an electronic...http://www.google.es/patents/US4398250?utm_source=gb-gplus-sharePatente US4398250 - Electronic cash register mutual transmission system for plurality of cash registers
Electronic cash register mutual transmission system for plurality of cash ...
