Calculator case

Details Calculator case Calculator case

1987-10-13

1990-07-03

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

D18 7

Patent

active

D03089860

REFERENCES:
patent: D236208 (1975-08-01), Takano
patent: D242721 (1976-12-01), Herr et al.
patent: D255246 (1980-06-01), Yoshioka

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