Calculator

Details Calculator Calculator

1983-04-27

1985-06-04

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02791099

REFERENCES:
patent: D230404 (1974-02-01), Jimbo
patent: D258891 (1981-04-01), Kitai et al.
patent: D273304 (1984-04-01), Sakata

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