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:
Jul. 20, 2010
Filed:
Mar. 21, 2008
Applicants:
Toshiro Sakai, Shuchi-gun, JP;
Shigeru Muramatsu, Hamamatsu, JP;
Inventors:
Toshiro Sakai, Shuchi-gun, JP;
Shigeru Muramatsu, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Shizuoka-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10C 3/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A material for a key of a keyboard instrument may include, but is not limited to, a base resin; and particles of a moisture control material that performs chemical sorption of moisture. The moisture control material increase in volume with moisture-sorption. The moisture control material decrease in volume with moisture-desorption.