Calculator

Details Calculator Calculator

1992-05-27

1993-07-20

Douglas, Alan P.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03376028

REFERENCES:
patent: D308984 (1990-07-01), Chu
patent: D310095 (1990-08-01), Noguchi
patent: D326471 (1992-05-01), Chen
Hong Kong Enterprise, Oct. 1989, p. 107, calculator KM503, lower center of pg.
Hong Kong Enterprise, Mar. 1989, p. 430, calculator W881-02, upper left corner of pg.
Hong Kong Enterprise, Oct. 1984, p. 311, calculator--top right corner--Universal Sales Co.

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