Case for hand-held electronic calculator

Details Case for hand-held electronic calculator Case for hand-held electronic calculator

1978-07-12

1980-08-12

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02563703

REFERENCES:
patent: D230404 (1974-02-01), Jimbo
patent: D241381 (1976-09-01), Garnier
patent: D243535 (1977-03-01), Ikeda
patent: D247391 (1978-02-01), Hazama et al.
patent: D249093 (1978-08-01), Hazama et al.
patent: 4158230 (1979-06-01), Washizuka et al.

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