Case for calculating machine

Details Case for calculating machine Case for calculating machine

1978-05-24

1980-11-11

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02575132

REFERENCES:
patent: D233442 (1974-10-01), Saito
patent: D239836 (1976-05-01), Ikeda
patent: D247198 (1978-02-01), Ohie

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