A control apparatus for vending machine free from necessity of replacing the main control program when a new function is to be supplemented to the sub-control units in the control apparatus or when an additional sub-control unit is to be added thereto, thus reducing the costs and labor. The apparatus...http://www.google.fr/patents/US6339726?utm_source=gb-gplus-shareBrevet US6339726 - Control apparatus for vending machine
