An electronic gambling unit for allowing a user to play a main gambling game and a bonus round game, and for dispensing value to the user at the conclusion of the bonus round game, may generally include a display unit capable of generating color images or other display mechanism capable of displaying...http://www.google.ca/patents/US20020107065?utm_source=gb-gplus-sharePatent US20020107065 - Casino gambling machine with bonus round award redemption
