Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1984-12-18

1986-10-07

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02860562

REFERENCES:
patent: D257976 (1981-01-01), Schmidt
patent: D258889 (1981-04-01), Hayashi
patent: D275768 (1984-10-01), Sawada
patent: D279104 (1985-06-01), Satake

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