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. 19, 2025
Filed:
Mar. 22, 2021
Applicant:
Fujikura Ltd., Tokyo, JP;
Inventor:
Yusuke Uemichi, Sakura, JP;
Assignee:
Fujikura Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 1/203 (2006.01);
U.S. Cl.
CPC ...
H01P 1/20363 (2013.01); H01P 1/203 (2013.01); H01P 1/20336 (2013.01);
Abstract
This invention can reduce the size of a filter device as compared to a conventional filter device having the same coupling degree. A filter device () includes: a substrate (); strip-shaped conductors (to); and a ground conductor layer (), an area facing an area interposed between adjacent ones of the strip-shaped conductors (betweenandand betweenand) having a first recessed portion (recessed portionsand) having a surface covered with the ground conductor layer ().