Patents by Inventor Yoshifumi Fukumoto

Yoshifumi Fukumoto 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).

  • Patent number: 5768072
    Abstract: A magnetic head comprises a first abutting segment formed with a winding groove having an open side, and a second abutting segment opposed to the open side of the groove and joined to the first segment. The first abutting segment comprises a first core segment having the groove, and gap spacers and second ferromagnetic thin films formed on the surface thereof opposed to the second segment and positioned above and below the groove. The first core segment comprises a core segment member made of a ferromagnetic material, formed with the groove and having a first ferromagnetic thin film which is formed on the surface thereof opposed to the second abutting segment and which is positioned toward the face of the head to be opposed to recording media. The second abutting segment has a face to be opposed to the recording medium and formed by a nonmagnetic material.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: June 16, 1998
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yutaka Ueta, Hiroyuki Ohno, Takao Yamano, Kiyotaka Itou, Kousou Ishihara, Kazuhiro Koga, Yoshifumi Fukumoto, Atsushi Furuzawa, Takahiro Ogawa, Hiroyuki Okuda, Toshinori Urano
  • Patent number: 5305166
    Abstract: A slider body and a yoke each made of a ferromagnetic oxide are butted against each other with a gap spacer provided therebetween. An air bearing portion is formed on the upper surface of the slider body. The yoke has a width t smaller than the width w of the air bearing portion, and is covered over both side faces thereof with glass and bonded to the slider body with the glass.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: April 19, 1994
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Atsushi Inoue, Fumio Kameoka, Hiroyasu Egashira, Satoru Ota, Yoshifumi Fukumoto, Masanori Hongo