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:
Feb. 26, 1991
Filed:
Sep. 28, 1989
Applicant:
Inventors:
Youhei Ishikawa, Kyoto, JP;
Toshiro Hiratsuka, Muko, JP;
Hirotsugu Abe, Yokaichi, JP;
Hisashi Takagaki, Kyoto, JP;
Sadao Yamashita, Kyoto, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01P / ; H01P / ;
U.S. Cl.
CPC ...
3332191 ; 333202 ; 333204 ; 333227 ;
Abstract
A band elimination filter which includes at least one or more TM-mode dielectric resonators each including a ceramic casing with an electrically conductive film formed over its inner surface or outer surface, and a dielectric column disposed in a cavity in the ceramic casing, and an electrode provided on the ceramic casing, out of contact with the electrically conductive film, with transmission lines being connected to the electrode.