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Filed: Nov. 11, 1890
Issued: Dec 15, 1891
Inventor: Dorr E. Felt
Along with using a pressing motion to record the machine calculations instead of a striking motion, Felt believed his invention provided other improvements, such as a better method of returning the numeral-wheels to zero, automatically recording any zeros to the right of the number being recorded, requiring less force to depress the device's keys, and improved calculation.
Image taken from U.S. Patent 465,255 - Digitized by Google