A bowling game enhances the traditional scoring of a strike or a spare when the bowler is able to time the rolling of the ball by a preselected location on the lane with a preselected location of an image being scanned transversely across the lane. The game uses a laser beam for illuminating a series...http://www.google.fr/patents/US6319142?utm_source=gb-gplus-shareBrevet US6319142 - Bowling game apparatus and method
