Desk top electronic calculator

Details Desk top electronic calculator Desk top electronic calculator

1981-09-15

1983-06-14

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02693569

REFERENCES:
patent: D230404 (1974-02-01), Jimbo
patent: D251271 (1979-03-01), Kobayashi
patent: D256696 (1980-09-01), Ikeda
patent: D261773 (1981-11-01), Ichikawa et al.
patent: 4209735 (1980-06-01), Yoshida
HFD-Retailing Home Furnishings, 10/13/1980, p. 77-Sanyo CX2550, Solar Power Memory Calculator at left center.

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