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:
Feb. 04, 1997
Filed:
May. 15, 1996
Applicant:
Inventor:
Andrew J Langley, Welwyn, GB;
Assignee:
Noise Cancellation Technologies, Inc., Linthicum, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
181206 ; 381 71 ;
Abstract
In an actively sound dampened muffler, the improvement of a venturi effect area producing means adjacent an aperture in said muffler near which is mounted a loudspeaker in an enclosure, the venturi effect area preventing hot exhaust gases from impinging on the loudspeaker.