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. 06, 2021
Filed:
Apr. 10, 2015
Applicant:
Mra Systems, Llc, Baltimore, MD (US);
Inventors:
Andrew Michael Roach, Baltimore, MD (US);
Graham Frank Howarth, Baltimore, MD (US);
Steven Thomas Davies, Baltimore, MD (US);
Richard David Cedar, Cincinnati, OH (US);
Michael Moses Martinez, Cincinnati, OH (US);
Timothy Richard Depuy, Cincinnati, OH (US);
Assignee:
MRA SYSTEMS, LLC, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10K 11/172 (2006.01); G10K 11/168 (2006.01); B24C 1/04 (2006.01);
U.S. Cl.
CPC ...
G10K 11/172 (2013.01); G10K 11/168 (2013.01); B24C 1/04 (2013.01); B24C 1/045 (2013.01);
Abstract
An acoustic liner () with perforation () and method of constructing () an acoustic liner including forming perforations in the facing sheet by grit blasting () the facing sheet and mounting () the facing sheet to one side of a support layer having a set of partitioned cavities wherein the facing sheet closes an open face of the cavities except for the perforations to form a set of acoustic resonator cells.