Lighted keytop

Details Lighted keytop Lighted keytop

1983-03-01

1986-02-04

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Element or attachment

Patent

active

D02824744

REFERENCES:
patent: D212865 (1968-12-01), Bowman et al.
patent: 4159183 (1979-06-01), Johannsen
patent: 4354079 (1982-10-01), Yoshimura
IBM Technical Disclosure Bulletin, vol. 13, No. 7, 12/70, p. 2041-Key Button 30.

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