Keyboard

Details Keyboard Keyboard

1990-07-10

1992-01-21

Hix, L. T.

Music

Instruments

General features

G10C 312

Patent

active

050818953

ABSTRACT:
A keyboard in which a stopper portion of an upper limit stopper of a black key detours an upper limit stopper of an adjoining white key so as to lie away from the black key side by side with a stopper portion of the upper limit stopper of the white key.

REFERENCES:
patent: 3306152 (1967-02-01), Klann
patent: 3561315 (1971-02-01), Ohno
patent: 3979990 (1976-09-01), Hinago
patent: 4351222 (1982-09-01), Kumano

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