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Patent
Suchergebnisse für: Keuffel and Esser
- Patent:12422649 17.01.2011 Bland, J. R. (P) Keuffel and Esser (P) : Slide Rule
- Patent:12500460 17.01.2011 Hunt, H. (P) Keuffel and Esser (P) : Slide Rule
- Patent:12534695 17.01.2011 Bland, J. R. (P) Keuffel and Esser (P) : Slide Rule
- Patent:12556806 17.01.2011 Gaire, P. E. (P) Keuffel and Esser (P) : Magnifying Runner for Slide Rules
- Patent:1809075 17.01.2011 Rechnitzer, Alexander (P) Keuffel and Esser (P) : Calculator
- Patent:US1904474 18.04.1933 Keuffel, Adolf W. (P) Keuffel and Esser (P) : Slide Rule
- Patent:US2415415 11.02.1947 Charles Christen Keuffel and Esser (P) : Calculator
- Patent:US2602574 08.07.1952 Frederick Zener, George Mangold Keuffel and Esser (P) : Slide Rule belt carrier
- Patent:US3282500 01.11.1966 Pikus, Alfred (P) Keuffel and Esser (P) : Calculating device for solving unknown qualitative parameters