Key input device

Details Key input device Key input device

1984-02-21

1987-09-08

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

340365VL, G06F 302

Patent

active

046927409

ABSTRACT:
A key input device to be attached to an electronic apparatus includes a keyboard having a plurality of key switches, and an exchangeable connector that is connectable to a body of the electronic apparatus for enabling the keyboard to be selected so that information is inputted into the electronic apparatus by the keyboard.

REFERENCES:
patent: 3940758 (1976-02-01), Margolin
patent: 3971925 (1976-07-01), Wenninger et al.
patent: 4086655 (1978-04-01), Tanimoto et al.
patent: 4120039 (1978-10-01), Fischer
patent: 4122526 (1978-10-01), Dlugos et al.
patent: 4330776 (1982-05-01), Dennison, Jr. et al.
patent: 4359222 (1982-11-01), Smith, III et al.
patent: 4523297 (1985-06-01), Ugon et al.

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