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:
Sep. 17, 2019
Filed:
Dec. 27, 2017
Laminated plyboard for musical instrument, method for manufacturing the same, and musical instrument
Applicant:
Yamaha Corporation, Hamamatsu-shi, JP;
Inventors:
Assignee:
YAMAHA CORPORATION, Hamamatsu-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D 13/02 (2006.01); G10D 13/02 (2006.01); B32B 21/04 (2006.01);
U.S. Cl.
CPC ...
G10D 13/028 (2013.01); B32B 21/042 (2013.01); B32B 2250/40 (2013.01); B32B 2255/08 (2013.01);
Abstract
A laminated plyboard for a musical instrument which reduces a loss of vibration energy due to internal friction while securing high rigidity with inexpensive cost. A laminated plyboardcomprises a first layer portion Sincluding layersand, a second layer portion Sincluding layersand, and an impregnated layerimpregnated with phenol and sandwiched between the first layer portion Sand the second layer portion S. A rigidity coefficient of the impregnated layeris higher than rigidity coefficients of the layerstothat configure the first layer portion Sand the second layer portion S