Dorr Felt

Dorr Eugene Felt (March 18, 1862 – August 7, 1930) is an American inventor and industrialist who is known for having invented the Comptometer, an early computing device, and the Comptograph, the first printing adding machine.

The Felt & Tarrant Manufacturing Company that he co-founds with Robert Tarrant on January 25, 1889 remains a major player in the calculator industry until the mid-1970s.

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