Dorr Felt
Dorr Eugene Felt (1862–1930) was an American inventor and industrialist who was 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-founded with Robert Tarrant on January 25, 1889 remained a major player in the calculator industry until the mid 1970s.
Read more about Dorr Felt: Biography
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