Calculator case

Details Calculator case Calculator case

1978-05-16

1980-11-11

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02575124

REFERENCES:
patent: D228502 (1973-10-01), Saito
patent: D230405 (1974-02-01), Jinbo
patent: D243957 (1977-04-01), Matsuda
patent: D245107 (1977-07-01), Mathis

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