The information of sales items is transmitted from a cash register 1 to a sensing device 2 and stored in a sales items memory 26. In the sensing device 2, a commodities information memory 25 stores the information relating to a nominal weight of each commodity as well as a nominal weight of a package....http://www.google.de/patents/US6384348?utm_source=gb-gplus-sharePatent US6384348 - Packing error detecting system
