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. 07, 1998
Filed:
Dec. 21, 1995
Applicant:
Inventors:
Gerrit F De Poortere, Sint Niklaas, BE;
Martinus P Van De Thillart, Eindhoven, NL;
Guido O D'Hoogh, Dendermonde, BE;
Joris A Nieuwendijk, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
381156 ; 381188 ; 181151 ; 181152 ;
Abstract
A sound-reproducing apparatus comprises an acoustic horn which terminates in an opening in the wall of the apparatus. An obstacle is arranged in the acoustic duct of the horn, which provides a better frequency response.