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. 23, 2004
Filed:
Mar. 22, 2002
Hatsuo Matsumoto, Sendai, JP;
Toru Ito, Miyagi, JP;
Masahiro Kondo, Sendai, JP;
Ryutaro Isoda, Sendai, JP;
Toshiya Sato, Sendai, JP;
Tadakuni Sato, Sendai, JP;
Teruhiko Fujiwara, Sendai, JP;
Masayoshi Ishii, Sendai, JP;
Haruki Hoshi, Sendai, JP;
NEC Tokin Corporation, Sendai, JP;
Abstract
An inductor component contains a drum magnetic core made of a magnetic material having a structure including integrated flanges at both ends of a columnar material, a coil wound around the columnar material in the drum magnetic core and placed between the flanges, and a permanent magnet placed in the neighborhood of the drum magnetic core with the coil wound around. This inductor component contains a sleeve core fitted to the outside of the drum magnetic core. The permanent magnet is placed in at least one gap in a closed magnetic circuit formed with the drum magnetic core and the sleeve core in order to apply a direct-current magnetic field in the direction opposite to the direction of a magnetic field generated by a magnetomotive force due to the coil.