Calculating machine

Details Calculating machine Calculating machine

1978-06-19

1980-05-27

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02551268

REFERENCES:
patent: D232833 (1974-09-01), Kitai et al.
patent: D238204 (1975-12-01), Sottsass, Jr.
patent: D239836 (1976-05-01), Ikeda
patent: D247198 (1978-02-01), Ohie

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