The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2000
Filed:
Dec. 04, 1997
Applicant:
Inventor:
Takamichi Masubuchi, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10C / ;
U.S. Cl.
CPC ...
8442 / ; 84433 ;
Abstract
A keyboard apparatus with at least one key having a rotation fulcrum and an exterior front end face on the opposite side of the rotation fulcrum in a performer side. The exterior front end face of the at least one key defines a front lower section. An extended section is provided at the front lower section of the at least one key that extends from the exterior front end face of the at least one key toward the performer side, and a mass member is attached to the extended section. The mass member therefore extends forwardly from the external front end face of the at least one key toward the performer side.