Electronic calculator

Details Electronic calculator Electronic calculator

1985-04-22

1987-06-16

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02903725

REFERENCES:
patent: D273393 (1984-04-01), Sakamoto
patent: D276242 (1984-11-01), Sakamoto
patent: D277681 (1985-02-01), Ishida
patent: D284200 (1986-06-01), Hayashi
HFD-Retailing Home Furnishings, 6/12/78, Section two, p. 35-Casio FX-3100 at top right.

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