Electronic calculator

Details Electronic calculator Electronic calculator

1986-09-24

1989-09-26

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03036782

REFERENCES:
patent: D257045 (1980-09-01), Ikeda
patent: D269276 (1983-06-01), Sawada
patent: D279109 (1985-06-01), Yubisui
patent: D287024 (1986-12-01), Satake
patent: D289903 (1987-05-01), Kikuchi
Best Co., 1983/1984, p. 326, #4.
Hong Kong Enterprise, 9/1985, p. 169.

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