A spinning reel slot machine comprises a plurality of mechanical rotatable reels and a video display. In response to a wager, the reels are rotated and stopped to randomly place symbols on the reels in visual association with a display area. The video display provides a video image superimposed upon...http://www.google.fr/patents/US7585220?utm_source=gb-gplus-shareBrevet US7585220 - Gaming machine with superimposed display image
