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      Scientific American May 31, 1919

      Patents and Profits

      Why Does an Inventor Sometimes Fail to Receive the Expected Reward?

      • By Dudley T. Fisher on May 31, 1919

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      More in the May 31, 1919 issue of Scientific American
      • The Park Place Subway Station Escalators
      • A Stethoscope for the Earth
      • To the Mayor of New York, Boy Scout Week and more
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