Patente aus den USA 1900
- Patent:US640825 09.01.1900 Elijah F. Spaulding Ideal Cash Register Comp. : Cash Register
- Patent:US640850 09.01.1900 Byron Work Gardner Work : Adding machine
- Patent:US640966 09.01.1900 Elijah F. Spaulding Ideal Cash Register Comp. : Cash register
- Patent:US641065 09.01.1900 Baldwin, Frank Stephen : Calculating-machine
- Patent:US641285 16.01.1900 Gardy, Henry D. und Burke, Taylor C. : Pocket Cash Register
- Patent:US641294 16.01.1900 Arpád Horváth : System of calculating
- Patent:US641363 16.01.1900 J. E. Blacker : Adding Machine
- Patent:US641433 16.01.1900 Buell, Salmon A. : Adjustable perpetual calendar
- Patent:US641517 16.01.1900 Charles E. Keel : Automatic computing machine
- Patent:US642713 06.02.1900 John Pfeifer Mast, Foos und Comp. : Cash register and indicator
- Patent:US644165 27.02.1900 W. A. Freret, Jr. : Cryptographic Type Writing Machine
- Patent:US644287 27.02.1900 Felt, Dorr E. : Tabulating Machine
- Patent:US644967 06.03.1900 Byrne, Hugh H. : Game-counter
- Patent:US674883 08.03.1900 Smith, Albert Computing Scale Company Dayton, Ohio : Weight and price indicating scale
- Patent:US646564 03.04.1900 Elijah F. Spaulding Ideal Cash Register Comp. : Cash Register
- Patent:US646599 03.04.1900 Gilbert W. Chapin : Adding Machine
- Patent:US646757 03.04.1900 Ohmer, John Ohmer Car Register Comp. : Fare-recorder
- Patent:US647238 10.04.1900 William P. Shattuck : Computing and listing machine
- Patent:US647867 17.04.1900 A. L. Patterson : Drawing Implement
- Patent:US648125 24.04.1900 Heinitz, Woldemar : Operating device for calculating machines, cash registers, etc.
- Patent:US648126 24.04.1900 Richard Henning Joseph Pallweber Adolf Kolbe : Cash register or adding machine
- Patent:US648576 01.05.1900 W. B. Taylor : Extensible Measuring Rule
- Patent:US648708 01.05.1900 Platt, Corwin H. American Arithmometer Comp. : Paper carrying and feeding attachment for adding machines
- Patent:US649522 15.05.1900 J. Mallmann : Calculating Machine
- Patent:US650066 22.05.1900 Küttner, Wilhelm; "William Küttner" : Calculating machine
- Patent:US651142 05.06.1900 Keuffel, William Keuffel und Esser Comp. : Slide rule
- Patent:US653250 10.07.1900 Lafond, Georges : Register
- Patent:US654181 24.07.1900 Rinsche, Frank Charles : Calculating Machine
- Patent:US654226 24.07.1900 Carrol, Thomas NCR : Cash Register
- Patent:US654674 31.07.1900 George M. Rickard : Computing device
- Patent:US654992 31.07.1900 Holmes Marshall National Addograph Comp. : Combined type-writing and computing machine
- Patent:US655027 31.07.1900 Smith, Walter : Computing Device
- Patent:US655653 07.08.1900 George J. Gnau : Calculator
- Patent:US657266 04.09.1900 Dennis, A.S. Bankers Adding & Recording Machine Co. : Typographical Adding Machine
- Patent:US657674 11.09.1900 W. G. Powell : Calculating Machine
- Patent:US657916 18.09.1900 Roger W. Conant : Calculating Instrument
- Patent:US658258 18.09.1900 Robert J. Hagey : Exposure-scale for photographers
- Patent:US658828 02.10.1900 Brandt, Edward J. : Coin delivery machine
- Patent:US659407 09.10.1900 C. T. Meredith : Machine for computing Numbers
- Patent:US659835 16.10.1900 Luther B. Thomas : Calculator
- Patent:US660108 23.10.1900 Hoch, Adam : Adding machine
- Patent:US661058 06.11.1900 Labofish, Charles S. : Calculating device for type-writers
- Patent:US661096 06.11.1900 Francis Alan Wilkinson Claud Carew Gibson : Calculating apparatus
- Patent:US661121 06.11.1900 Felt, Dorr E. : Calculating Machine
- Patent:US661756 13.11.1900 H. Claassen : Apparatus for Controlling the Boiling of Sugar Juices
- Patent:US771289 24.11.1900 Whitehouse, H.B. : INDEX-CARD HOLDER FOR CASH-REGISTERS.
- Patent:US662899 27.11.1900 Winn, Henry; Spalding, Chester M.]] : Counting-register
- Patent:US663890 18.12.1900 Hanson, Hans J. : Calculating Machine
- Patent:US663891 18.12.1900 Hanson, Hans J. : Computing machine
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