Calculator

Details Calculator Calculator

1986-11-06

1990-07-03

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03089843

REFERENCES:
patent: D290117 (1987-06-01), Nogami
patent: D296527 (1988-07-01), Chu
Evans, 1980/81, p. 229.
Hong Kong Enterprise, Jan. 1985, p. 26.
Hong Kong Enterprise, May 1986, p. 46.

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