Calculator

Details Calculator Calculator

1983-01-14

1985-10-29

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02811723

REFERENCES:
patent: D231989 (1974-07-01), Kitai
patent: D269875 (1983-07-01), Ishida
patent: D271767 (1983-12-01), Gaie
patent: D275009 (1984-08-01), Shibata
patent: D276230 (1984-11-01), Akiyama

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