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Die große Enzyklopädie des mechanischen Rechnens

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Pfeil.gif Patents  Pfeil.gif USA  Pfeil.gif 1864

Patente aus den USA 1864


  • Patent:US41898 15.03.1864 Joseph B. Alexander, Baltimore Md. : Calculating Machine
  • Patent:US42776 17.05.1864 A. Jillson : Sliding Scale for Steam Engines
  • Patent:US45482 20.12.1864 John Dolbeer : Machine for counting


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