"sensitive recording mediumUS5825402 *Mar 26, 1993Oct 20, 1998Symbol Technologies, Inc.Method and appratus for reading and writing indicia such as bar codes using a scanned laser beamUS5900900 *Jul 7, 1997May 4, 1999Ricoh Company, Ltd.Image recording method using reversible thermosensitive recording material and image display apparatus using the sameUS5948727 *Aug 29, 1995Sep 7, 1999Ricoh Company," . . . . .