Calculator

Details Calculator Calculator

1985-10-09

1988-02-09

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02941511

REFERENCES:
patent: D238788 (1976-02-01), Goldsamt
patent: D258889 (1981-04-01), Hayashi
patent: D286056 (1986-10-01), Kikuchi et al.
patent: 4218755 (1980-08-01), Root

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