Search Results: Comptograph

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Comptometer
Kamis, 2026-06-18 02:27:51

both comptometers and comptographs throughout the 1890s. In 1902, the Comptograph Company was set up to manufacture comptographs exclusively, but was shut...

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Dorr Felt
Minggu, 2025-08-31 15:33:55

having invented the Comptometer, an early computing device, and the Comptograph, the first printing adding machine. The Felt & Tarrant Manufacturing...

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Timeline of computing before 1950
Sabtu, 2026-07-11 19:20:20

forty years (Dorr E. Felt only sold one hundred comptometers and a few comptographs from 1887 to 1890). Its simplicity made it the most reliable calculator...

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Newark, Wisconsin
Jumat, 2026-05-08 07:40:05

farmer Dorr E. Felt (1862–1930), Inventor of the Comptometer and of the Comptograph, co-founder of the Felt & Tarrant Manufacturing Company Eugene K. Felt...

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