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. 19, 1994
Filed:
Apr. 14, 1992
Applicant:
Inventors:
Yoshitaka Kurihara, Kadoma, JP;
Yuzo Okudaira, Kadoma, JP;
Hideyuki Ando, Kadoma, JP;
Wakio Yamada, Kadoma, JP;
Kazunori Umeoka, Kadoma, JP;
Takashi Nakai, Kadoma, JP;
Assignee:
Matsushita Electric Works, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428328 ; 428161 ; 428172 ; 428323 ; 428338 ; 181290 ; 181284 ;
Abstract
A sound absorptive material has powder particles having a sound absorption characteristics at a low frequency and generally supported in a vibratable state by a porous support, whereby the sound absorptive material can be increased in the sound absorption coefficient in the low frequency range while maintaining the absorptive material to be thin.