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.

Date of Patent:
Feb. 20, 1996

Filed:

Mar. 18, 1994
Applicant:
Inventors:

Hiroshi Iidaka, Tokyo, JP;

Eiji Shibata, Gunma, JP;

Manpei Tamamura, Ohta, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B / ; A61F / ;
U.S. Cl.
CPC ...
381 71 ; 381 94 ;
Abstract

The vehicle internal noise reduction system is characterized in being able to attenuate the internal noise sounds at a broad area of the passenger compartment by generating optimum canceling sounds from speakers disposed in the passenger compartment under any operating conditions.


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