Calculator

Details Calculator Calculator

1990-03-08

1993-02-02

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

D18 6

Patent

active

D03329615

REFERENCES:
patent: D305668 (1990-01-01), Sakaguchi et al.
patent: D306311 (1990-02-01), Sugi et al.
patent: D318287 (1991-07-01), Tsukamoto

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