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:
May. 12, 2009
Filed:
Feb. 11, 2004
Applicant:
Arthur Perry Berkhoff, Doetinchem, NL;
Inventor:
Arthur Perry Berkhoff, Doetinchem, NL;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 1/06 (2006.01); F01N 1/20 (2006.01); F01N 1/02 (2006.01); G10K 11/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A device for actively reducing sound transmission, provided with a first and second wall () enclosing an inner space (), wherein at least the second wall () is provided with actuators (), for instance eletromagnetic actuators and/or piezoeleteric elements, wherein the said inner space is provided with at least one inner wall () to divide this space into at least two layers of air (), which inner wall () is arranged such that the layers of air () are in fluid connection with each other.
Berkhoff, Arthur. (2009). Device for actively reducing sound transmission, and panel comprising such device (U.S. Patent No. 7530426). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7530426
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile