. . . "Inc.Adaptive bar code scannerUS6533174Oct 20, 1998Mar 18, 2003Symbol Technologies, Inc.Method and apparatus for reading and writing indicia such as bar codes using a scanned laser beamUS6637658 *Jan 22, 2001Oct 28, 2003Welch Allyn, Inc.Optical reader having partial frame operating modeUS6672510 *Dec 20, 2001Jan 6, 2004Scannabar (3193519 Canada Inc.)Bar code arrangement for identifying positions al" . .