Patents by Inventor Toshihisa Obuse

Toshihisa Obuse 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).

  • Complex magnetic head and manufacturing method of complex magnetic head core
    Patent number: 6400530
    Abstract: A method for manufacturing a magnetic head core of a complex magnetic head includes binding a first core material of a U-shaped cross section and a second core material of a flat plate shape to form a tubular core material having two bonded portions between the first and second core materials. Then a plurality of grooves are formed in the tubular core material across one of the bonded portions to form a plurality of track surfaces. The grooves are then filled with a fused glass material, and the other of the bonded portions is removed to form a substantially U-shaped core block having a plurality of track surfaces separated by the glass-filled grooves. The U-shaped core block is then sliced along each of the grooves to obtain a plurality of magnetic head cores. A complex magnetic head manufactured by the method is also disclosed.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: June 4, 2002
    Assignee: Mitsubishi Denki K.K.
    Inventors: Hirofumi Ouchi, Toshihisa Obuse, Yoshio Kasuga, Tatsunori Hibara, Masao Kouhashi, Kouichi Yamada, Seiichi Handa, Hiromasa Ishii, Seiichi Watanabe
  • Manufacturing method of complex magnetic head core
    Patent number: 6088909
    Abstract: A method for manufacturing a magnetic head core of a complex magnetic head includes binding a first core material of a U-shaped cross section and a second core material of a flat plate shape to form a tubular core material having two bonded portions between the first and second core materials. Then a plurality of grooves are formed in the tubular core material across one of the bonded portions to form a plurality of track surfaces. The grooves are then filled with a fused glass material, and the other of the bonded portions is removed to form a substantially U-shaped core block having a plurality of track surfaces separated by the glass-filled grooves. The U-shaped core block is then sliced along each of the grooves to obtain a plurality of magnetic head cores. A complex magnetic head manufactured by the method is also disclosed.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: July 18, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hirofumi Ouchi, Toshihisa Obuse, Yoshio Kasuga, Tatsunori Hibara, Masao Kouhashi, Kouichi Yamada, Seiichi Handa, Hiromasa Ishii, Seiichi Watanabe