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      Knowledge is Power

      Scientific American March 09, 1878

      Patents - March 9, 1878

      Caveats, Copyrights, Trade Marks, Etc.

      • March 9, 1878

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      More in the March 09, 1878 issue of Scientific American
      • Fish Teeth Set on Hinges
      • The Cereus Candicans
      • A Brief History of Our Patent System
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