Born
1862
Died
1930
Nationality
American
Events involving Dorr E. Felt (2)
1887
ID: 4467
Dorr Felt patents Comptometer - first successful key-driven adding machine, faster than previous designs
ID: 4467
1889
ID: 4471
Felt & Tarrant introduce Comptograph - adds printing capability to comptometer design
ID: 4471