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Pfeil.gif Patents  Pfeil.gif USA  Pfeil.gif 1872

Patente aus den USA 1872


  • Patent:US126123 23.04.1872 A. W. Price : Improvement in Arithmetical Sum-Setter
  • Patent:US129335 16.07.1872 George B. Grant : Calculating-machine
  • Patent:US129531 16.07.1872 Benjamin C. Coldwell : Improvement in interest calculators
  • Patent:US130017 30.07.1872 Henry Chandler : Improvement in counting-register
  • Patent:US130244 06.08.1872 Wiliam Robjohn : Calculating-machine
  • Patent:US130404 13.08.1872 E.D. Barbour : Improvement in calculating machines
  • Patent:US132553 29.10.1872 Joseph W. Wormald : Improvement in Game-registers
  • Patent:US133188 19.11.1872 E.D. Barbour : Improvement in calculating machines


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