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      Knowledge is Power

      Scientific American December 11, 1920

      The Needs of the Patent Office

      Results of the Insistence that This Most Vital Government Bureau Pay an Operating Profit

      • By William I. Wyman on December 11, 1920

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      More in the December 11, 1920 issue of Scientific American
      • An Airplane with Variable Wing Surface Area, Paper from Veneer Waste
      • Naval and Merchant Marine, Astronomy and more
      • Wanted: An Inexpensive House
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