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      Scientific American September 28, 1872

      Recent American and Foreign Patents - September 28, 1872

      • September 28, 1872

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      More in the September 28, 1872 issue of Scientific American
      • Business and Personal - September 28, 1872
      • Foreign Patents—A Hint to Patentees
      • New Books and Publications - September 28, 1872
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