printingUS649301422 Dic 200010 Dic 2002Impress SystemsOptical security device printing systemUS653317420 Oct 199818 Mar 2003Symbol Technologies, Inc.Method and apparatus for reading and writing indicia such as bar codes using a scanned laser beamUS6547137 *28 Nov 200015 Abr 2003Larry J. BegelferSystem for distribution and control of merchandiseUS65818391 Sep 200024 Jun 2003American Express Travel