Method of supplying the various departments of shopping centers with department-specific information

Abstract From the Canadian patent

The invention relates to a method of supplying the various departments of shopping centers or the like wherein shopping carts or trolleys are used with department-specific information as well as with independently selectable additional informative items. Each information is digitally processed in central facilities, stored and subsequently transmitted on lines in time-compressed form and in a certain cycle to the various departments. The time-compressed information is then serially sent by wireless transmission into the area of the respective department. Department-specific information thus transmitted is received by the receiving unit of any shopping cart within that area temporarily …