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. 31, 2007
Filed:
May. 03, 2004
Ping Sheng, East Point, HK;
Man Tse, East Point, HK;
Che Ting Chan, East Point, HK;
Xi Xiang Zhang, East Point, HK;
Zongjin LI, East Point, HK;
Nelson Cue, East Point, HK;
Weijia Wen, East Point, HK;
Ping Sheng, East Point, HK;
Man Tse, East Point, HK;
Che Ting Chan, East Point, HK;
Xi Xiang Zhang, East Point, HK;
Zongjin Li, East Point, HK;
Nelson Cue, East Point, HK;
Weijia Wen, East Point, HK;
RSM Technologies Limited, Tseung Kwan O, HK;
Abstract
Acoustic attenuation materials are described that comprise outer layers of a stiff material sandwiching a relatively soft elastic material therebetween, with means such as spheres, discs or wire mesh being provided within the elastic material for generating local mechanical resonances that function to absorb sound energy at tunable wavelengths.