Disclosed is a fully automatic bar code symbol reading system having an hand-supportable laser bar code reading device. The system has a number of operative states including, an object detection state, bar code presence detection state and a bar code symbol decoding state. During bar code symbol presence...http://www.google.com/patents/US5484992?utm_source=gb-gplus-sharePatent US5484992 - Automatic hand-supportable laser scanner with flickering laser scanning beam to improve visibility thereof and beam-symbol alignment during bar code symbol presence detection
