A slot machine for playing games has a set of three normal reels, with symbols arranged on their peripheries. The normal reels are rotated in a normal game, and are stopped to determine a win, in accordance with a combination of symbols of the normal reels along a predetermined first winning...http://www.google.fr/patents/US5722891?utm_source=gb-gplus-shareBrevet US5722891 - Slot machine having two distinct sets of reels
