Calculator

Details Calculator Calculator

1985-12-16

1988-02-09

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02941520

REFERENCES:
patent: D238951 (1976-02-01), Herr et al.
patent: D258666 (1981-03-01), Yoshioka et al.
patent: D273392 (1984-04-01), Sakata
patent: D273795 (1984-05-01), Yamagami
patent: D274822 (1984-07-01), Yamagami et al.

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