A machine for vending snacks, product samples, customer appreciation prizes, or time-metered services which offers a patron a game of chance. A patron receives a free fractional vend with a previously purchased product for use in a vending machine having products produced by the same manufacturer, wherein...http://www.google.ca/patents/US20070026916?utm_source=gb-gplus-sharePatent US20070026916 - Vending machine having a game of chance
