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:
Aug. 17, 1999
Filed:
Oct. 17, 1997
Applicant:
Inventor:
Shoji Ono, Nagoya, JP;
Assignee:
NGK Spark Plug Co., Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P / ;
U.S. Cl.
CPC ...
333206 ; 333207 ;
Abstract
A dielectric filter in which an open-circuiting end surface of a dielectric ceramic block is provided with a conductor pattern for each of the inner resonators and an additional conductor for each of the outermost resonators, the conductor patterns are intended to capacitively coupling the resonators with each other, and the additional conductors are intended to increase the effective resonant length of the outermost resonators, thereby the resonant frequencies of the resonators can be made substantially agree with each other.