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      Knowledge is Power

      Scientific American October 1922

      Recently Patented Inventions, October 1922

      Brief Descriptions of Newly Invented Mechanical and Electrical Devices, Tools, Farm Implements, Etc.

      • October 1, 1922

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      More in the October 1922 issue of Scientific American
      • A Candidate for the British-American Cup Contest
      • Colloidal Metals That Cure Human Ills, Ammonia Table
      • Information Leaflet Issued By Patent Office
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