Desk top electronic calculator

Details Desk top electronic calculator Desk top electronic calculator

1979-04-04

1981-09-15

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02607760

REFERENCES:
patent: D243535 (1977-03-01), Ikeda
HFD-Retailing Home Furnishings, 6/12/1978, p. 35-Casio Fx. 48 Math Card at top center.
HFD-Retailing Home Furnishings, 6/5/1978, p. 55-Sharp Omni EL-8145 at top left.

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