Patents by Inventor Ryutaro Isoda

Ryutaro Isoda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Inductor component containing permanent magnet for magnetic bias and method of manufacturing the same
    Publication number: 20040168303
    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.
    Type: Application
    Filed: March 1, 2004
    Publication date: September 2, 2004
    Applicant: NEC TOKIN CORPORATION
    Inventors: Hatsuo Matsumoto, Toru Ito, Masahiro Kondo, Ryutaro Isoda, Toshiya Sato, Tadakuni Sato, Teruhiko Fujiwara, Masayoshi Ishii, Haruki Hoshi
  • Inductor component containing permanent magnet for magnetic bias and method of manufacturing the same
    Patent number: 6710693
    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.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: March 23, 2004
    Assignee: NEC Tokin Corporation
    Inventors: Hatsuo Matsumoto, Toru Ito, Masahiro Kondo, Ryutaro Isoda, Toshiya Sato, Tadakuni Sato, Teruhiko Fujiwara, Masayoshi Ishii, Haruki Hoshi
  • Inductor component containing permanent magnet for magnetic bias and method of manufacturing the same
    Publication number: 20020190830
    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.
    Type: Application
    Filed: March 22, 2002
    Publication date: December 19, 2002
    Applicant: Tokin Corporation
    Inventors: Hatsuo Matsumoto, Toru Ito, Masahiro Kondo, Ryutaro Isoda, Toshiya Sato, Tadakuni Sato, Teruhiko Fujiwara, Masayoshi Ishii, Haruki Hoshi