Music – Instruments – General features
Patent
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
Blankenship Howard B.
Carrier Joseph P.
Hix L. T,.
Kabushiki Kaisha Kawai Gakki Seisakusho
Petrik Robert M.
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