A multi-chamber vending machine having an outer housing and upper and lower chambers inside the housing. The upper chamber has a bottom wall and a plurality of vertically extending walls. The lower chamber surrounds a portion of the bottom wall of the upper chamber and a portion of a vertically extending...http://www.google.fr/patents/US4679684?utm_source=gb-gplus-shareBrevet US4679684 - Multiple chamber automated vending machine
