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      Scientific American November 27, 1915

      Inventions New and Interesting - November 27, 1915

      Simple Patent Law; Patent Office News; Notes on Trademarks

      • November 27, 1915

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      More in the November 27, 1915 issue of Scientific American
      • A Car with Electro-Magnetic Transmission
      • Recently Patented Inventions - November 27, 1915
      • Manufacture of Steel Helmets for the French Soldiers
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