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1989 Index to the U.S. Patent Classification i (1989)

handle is hein.intprop/inuspacl1989 and id is 1 raw text is: 






                   NDI)


             U.S. PA'


CLASSIFICA'


TO THE


DECEMBER 1989


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

     U.S. Patent and Trademark Office
               Donald J. Quigg
           Assistant Secretary and
 Commissioner of Patents and Trademarks

          Alice B. Aderholt, Editor
          Office of Documentation

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