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. 28, 1989
Filed:
May. 11, 1987
Osamu Yamato, Tokyo, JP;
Hiroyuki Horii, Tokyo, JP;
Tetuji Takino, Tokyo, JP;
Takanori Yamasaki, Tokyo, JP;
Yoshimitu Sakurai, Tokyo, JP;
Hisao Matsukura, Tokyo, JP;
Ichiro Iwase, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A dielectric filter of which a characteristic is stable without a gastight casing. The dielectric filter's structure is comprised of an input, an output, a dielectric having a plurality of holes extending from a top to a bottom surface thereof, each of the holes being covered with a first conductive material, a second conductive material being electrically connected to the first conductive material at the bottom surface and unconnected to the first conductive material at the top surface, and an insulating weatherproof coating provided on the top surface.