Electronic calculator with radio

Details Electronic calculator with radio Electronic calculator with radio

1986-08-12

1990-02-06

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Combined

D18 7

Patent

active

D03059065

REFERENCES:
patent: D258666 (1981-03-01), Yoshioka et al.
patent: D260646 (1981-09-01), Akazawa et al.
patent: D262293 (1981-12-01), Anzai
patent: D276521 (1984-11-01), Arimura
patent: D290701 (1987-07-01), Hamada et al.
patent: D294573 (1988-03-01), Ohzu
Best Catalog, 1981/1982, p. 321, Sony Walkman, #6, Gr. 290 Library.
Hong Kong Enterprise, 1/1985, p. 10, middle left #219SE, Tronica, Gr. 290 Library.

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