A gaming apparatus may include a primary display unit, a value input device, a first controller coupled to the primary display unit and the value input device, a microprocessor and associated memory, and a second display unit. The secondary display unit may include a viewing window, a first object coupled...http://www.google.es/patents/US7341520?utm_source=gb-gplus-sharePatente US7341520 - Moving three-dimensional display for a gaming machine
Moving three-dimensional display for a gaming machine
