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:
Jan. 08, 1991
Filed:
Aug. 31, 1989
Applicant:
Inventors:
J Richard Aylward, W. Newton, MA (US);
Timothy Holl, Medway, MA (US);
William J Keezer, Sherborn, MA (US);
Assignee:
Bose Corporation, Framingham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04S / ;
U.S. Cl.
CPC ...
381-1 ; 381 98 ;
Abstract
A circuit controls the sound pressure level produced by a separate bass transducer in a multi-channel audio system having a number of upper frequency channels such that the perceived frequency response of the system remains substantially constant.