Electronic calculator

Details Electronic calculator Electronic calculator

1984-06-15

1986-12-02

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02870240

REFERENCES:
patent: D255124 (1980-05-01), Ohie
patent: D269278 (1983-06-01), Yoshioka et al.
patent: D269356 (1983-06-01), Yoshioka et al.
patent: D273303 (1984-04-01), Sakamoto
patent: D273593 (1984-04-01), Sakamoto

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