Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1981-09-28

1983-06-07

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02692775

REFERENCES:
patent: D251330 (1979-03-01), Kurosu et al.
patent: D260777 (1981-09-01), Yoshioka et al.
patent: D263150 (1982-02-01), Anzai et al.
patent: 3996428 (1976-12-01), Buan et al.
Solarex Corp. Reprint of 3/77, Jewelers' Circular-Keystone, Article .COPYRGT.1977, Coverage-Solar Calculator at left.
HFD-Retailing Home Furnishings, 10/13/80, p. 77, Solar Power Calculator CX2550 at left center.

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