Desk-top electronic calculator

Printing and office machinery – Typewriter or calculator – Calculator

Patent

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Details

D18 2, D1801

Patent

active

D02684217

REFERENCES:
patent: D203766 (1966-02-01), Maifeld
patent: D226485 (1973-03-01), Kitai
patent: D233153 (1974-10-01), Saito
HFD-Retailing Home Furnishings, 2/12/1979, p. 54-Sharp Model 1168 at bottom.

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