In a slot machine, a specific winning line among a plurality of winning lines, e.g., an effective winning line or a winning line on which a winning symbol array appears, is optically identified. To identify a winning line or lines, series of light emitting diodes are disposed along the winning line or...http://www.google.es/patents/US4718672?utm_source=gb-gplus-sharePatente US4718672 - Slot machine
