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. 14, 2004
Filed:
Oct. 11, 2002
Shuo Wang, Dearborn, MI (US);
Gordon Ebbitt, Ann Arbor, MI (US);
Mark W. Fero, Clinton Township, MI (US);
Roland Woodcock, Bloomfield Hills, MI (US);
Brian A. Cristea, Royal Oak, MI (US);
Paul G. Deacon, Salino, MI (US);
Lear Corporation, Southfield, MI (US);
Abstract
Acoustical attenuating devices ( ) and method of forming them. The attenuating devices ( ) include an exterior layer ( ), a sound absorption layer ( ), and multiple perforated layers ( ) coupled to the sound absorption layer ( ). The perforated layers ( ) include a perforated structural layer ( ) and a perforated substrate layer ( ). The perforated structural layer ( ) and the perforated substrate layer ( ) provide structural stiffness and define multiple resonating tubes ( ) that attenuate sound.