Patent
Patentdatenbank USA 1878
- Patent:US198934 08.01.1878 C. C. Fields : Adding-Registers for Pencils
- Patent:US199289 15.01.1878 William Hart : Calculator
- Patent:US200911 05.03.1878 Milton W. Hinkle : Improvement in adding-machines
- Patent:US201617 26.03.1878 J. Kachelman Jr. : Perpetual Time and Interest Calendar
- Patent:US203151 30.04.1878 Hopkins, William W. : Improvement in calculating-machines
- Patent:US203189 30.04.1878 Philip Orth : Improvement in game-counters
- Patent:US203763 14.05.1878 Charles E. Patterson : Improvement in calculating-machines
- Patent:US204404 28.05.1878 Charles B. Wessmann : Improvement in game-counters
- Patent:US205993 14.05.1878 Borland, William P. und Hoffmann, Hermann : Improvement in adding machines
- Patent:US206136 16.07.1878 Egbert F. Roche : Improvement in adding-sticks
- Patent:US207255 20.08.1878 Clay, Mark W. (P) : Improvement in adding-machines
- Patent:US207487 27.08.1878 J. I. Bogue : Calculator
- Patent:US207918 10.09.1878 Verea, Ramón : Calculating-machine
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- Patent:USRE8334 16.07.1878 J. Kachelman, Jr. : Perpetual Time and Interest Calculator