Felt’s first prototype presented to the Smithsonian Institution

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Date
1937
Credit Line
Courtesy of the Library of Congress
Keywords
Tarrant, Robert; Felt, Dorr E.; Mechanical calculation; Comptometer
Object ID
500004222

Felt’s daughter, Virginia Felt Koch, and her husband Raymond, present his “macaroni-box” prototype to Charles Abbot, Secretary of the Smithsonian.