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:
Mar. 22, 2011
Filed:
Aug. 23, 2007
Applicants:
Minoru Tachibana, Osaka, JP;
Hideki Nanba, Kyoto, JP;
Inventors:
Minoru Tachibana, Osaka, JP;
Hideki Nanba, Kyoto, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 1/205 (2006.01);
U.S. Cl.
CPC ...
Abstract
A filter device having a frame made of plated steel sheet generates a smaller insertion loss and is excellent in productivity. Resonant elements are shaped into a cylindrical form by bending the steel sheet, whose both sides are plated, before they are placed in a filter housing. A gap formed on a lateral face of each resonant element is brazed with solder, and an outer plated face of each resonant element is brazed with solder to an inner plated face of the frame.