Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1985-05-24

1987-04-21

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02894181

REFERENCES:
patent: D268422 (1983-03-01), Yoshioka et al.
patent: D269356 (1983-06-01), Yoshioka et al.
patent: D285934 (1986-09-01), Yoshioka et al.

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