Electronic calculator

Details Electronic calculator Electronic calculator

1984-09-28

1986-08-26

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02853116

REFERENCES:
patent: D269875 (1983-07-01), Ishida
patent: D278060 (1985-03-01), Kitai
patent: D279580 (1985-07-01), Kurihara

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