A structure of a box-like game unit to be arranged in large number outside of and adjacently to a main body of a game machine such as a casino game machine, a horse race game machine, a boat race game machine or the like. The game unit comprises a game unit cabinet of box-shape having a front face and...http://www.google.com.tw/patents/US6464586?utm_source=gb-gplus-share專利 US6464586 - Game unit
