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. 10, 1990
Filed:
Sep. 02, 1988
Takamichi Masubuchi, Shizuoka, JP;
Jun-ichi Mishima, Shizuoka, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
A keyboard assembly for forming a keyboard apparatus of an electronic musical instrument, including a combination of at least two key units each having a plurality of key members and an elongated bracket portion connecting the key members together, a frame structure to which the key units are assembled together in such a manner that each of the individual key members of the key units is allowed to rock independently of each other about an axis fixed with respect to the frame structure and parallel with the bracket portion of each key unit, and plural combinations of a concavity formed in the bracket portion of one of the key units and a projection formed in the bracket portion of the other of the key units and received in the concavity for establishing a first predetermined positional relationship between each of the key units before the key units are assembled to the frame structure.