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Brevetti  Stati Uniti  1868

 
  • Patent:US73290 14.01.1868 F. Bowly : Instrument for describing Ellipses
  • Patent:US73449 21.01.1868 Levi Keiler : Improvement in Calculating-machines
  • Patent:US73732 28.01.1868 Alonzo Johnson, Springfield, Mass., assignor to Sylvester Bissell and Andrew B. West, Hartford,Conn. : Calculating-apparatus
  • Patent:US74170 04.02.1868 Thomas T. Strode : calculating & registering machine
  • Patent:US74641 18.02.1868 Wallworth, Thomas : Apparatus for Computing or reckoning quantities
  • Patent:US75322 10.03.1868 Webb, Charles Henry (P) : Adding Machine
  • Patent:US77736 12.05.1868 I.S. Hyatt : Tax Calculator
  • Patent:US79209 23.06.1868 C. Corliss : Instrument for Adding Figures
  • Patent:US79272 23.06.1868 C. Corliss, N. Spofford : Instrument for Adding and Registering Numbers
  • Patent:US80077 21.07.1868 C. Littlefield : Measuring Lumber
  • Patent:US80618 04.01.1868 Jacob S. Detrick William R. Eckert : Counting-register
  • Patent:US84476 01.12.1868 E. A. Chameroy : Fluid Meter
  • Patent:US85229 22.01.1868 Alonzo Johnson, Springfield, Mass., assignor to Sylvester Bissell and Andrew B. West, Hartford,Conn. : Calculating-apparatus

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