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1990 Index to the U.S. Patent Classification i (1990)

handle is hein.intprop/inuspacl1990 and id is 1 raw text is: 










              U.S. PA'


CLASSIFICA'


TO THE


DECEMBER 1990




                   Stf. l or CO -




                   'rNrEs ov





  U.S. DEPARTMENT OF COMMERCE
     Robert A. Mosbacher, Secretary


       U.S. Patent and Trademark Office
              Harry F. Manbeck, Jr.
              Assistant Secretary and
  Commissioner of Patents and Trademarks

            Evelyn G. Freeman, Editor
            IOffice of Documentation

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