Electronic calculating machine

Details Electronic calculating machine Electronic calculating machine

1977-06-23

1978-08-15

Lucas, Susan J.

Printing and office machinery

Printing equipment

Hand held or manipulated

D1801

Patent

active

D02489953

REFERENCES:
patent: D232836 (1974-09-01), Kitai
patent: D236269 (1975-08-01), Shu-Keung
Merchandising Week, Jan. 6, 1975, p. 47, "Casio", Mini-Root Calculator.

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