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. 08, 2003
Filed:
Oct. 17, 2001
Applicant:
Inventors:
Hideki Morozumi, Yamatokoriyama, JP;
Daisuke Bessyo, Kitakatsuragi-gun, JP;
Kenzo Ohji, Ikoma, JP;
Takeshi Nagai, Kitakatsuragi-gun, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/700 ;
U.S. Cl.
CPC ...
H04R 1/700 ;
Abstract
An acoustic matching member is used, when a sound is propagated from a first object to a second object, for matching an acoustic impedance of the first object and an acoustic impedance of the second object. The acoustic matching member includes a plurality of fine pieces , and at least one of the plurality of fine pieces is bonded with at least another of the plurality of fine pieces at a contact portion so as to form a gap in the acoustic matching member