A method of providing incentive to play gaming devices during certain off-peak hours comprises three types of periods: an earning period over which earned credits are accumulated responsive to the level of play on the gaming device, a redeeming period where the earned credits can be played, and a regular...http://www.google.fr/patents/US6878063?utm_source=gb-gplus-shareBrevet US6878063 - Method for implementing scheduled return play at gaming machine networks
Method for implementing scheduled return play at gaming machine networks