Patents by Inventor Koichi Miyagawa

Koichi Miyagawa 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).

  • Working method of bar block and manufacturing method of thin-film magnetic head
    Patent number: 6802115
    Abstract: A working method of a bar block with a plurality of magnetic head elements and a plurality of pairs of electrode terminals electrically connected to the plurality of magnetic head elements arranged on an element-formed surface of the bar block in at least one line. This method includes a step of pre-laminating an ACF on the element-formed surface of the bar block, a step of bonding a conductive plate member with a plurality of projections located at positions faced to the plurality of pairs of terminal electrodes of the bar block, respectively, on the ACF so that each pair of the terminal electrodes is electrically short-circuited with each other, and a step of, then, working the bar block.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: October 12, 2004
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Masashi Shiraishi, Koichi Miyagawa
  • Spring sheet
    Patent number: 6726191
    Abstract: A lower spring sheet has receiving portions on a sheet surface that supports a coil spring. Thus the sheet surface and a spring end portion of the coil spring come into contact discretely. The contact positions between the coil spring and the sheet surface maintain unchanged, however a undulated portion the spring end portion may have due to the manufacturing tolerance is extended when the coil spring is compressed.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: April 27, 2004
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Koichi Miyagawa, Takashi Fujii, Nobuo Momose, Junji Ogura, Masahiko Shimizu
  • Spring sheet
    Publication number: 20030111782
    Abstract: A lower spring sheet has receiving portions on a sheet surface that supports a coil spring. Thus the sheet surface and a spring end portion of the coil spring come into contact discretely. The contact positions between the coil spring and the sheet surface maintain unchanged, however a undulated portion the spring end portion may have due to the manufacturing tolerance is extended when the coil spring is compressed.
    Type: Application
    Filed: January 29, 2003
    Publication date: June 19, 2003
    Inventors: Koichi Miyagawa, Takashi Fujii, Nobuo Momose, Junji Ogura, Masahiko Shimizu
  • Working method of bar block and manufacturing method of thin-film magnetic head
    Publication number: 20030005573
    Abstract: A working method of a bar block with a plurality of magnetic head elements and a plurality of pairs of electrode terminals electrically connected to the plurality of magnetic head elements arranged on an element-formed surface of the bar block in at least one line. This method includes a step of pre-laminating an ACF on the element-formed surface of the bar block, a step of bonding a conductive plate member with a plurality of projections located at positions faced to the plurality of pairs of terminal electrodes of the bar block, respectively, on the ACF so that each pair of the terminal electrodes is electrically short-circuited with each other, and a step of, then, working the bar block.
    Type: Application
    Filed: June 17, 2002
    Publication date: January 9, 2003
    Applicant: SAE Magnetics (H. K.) Ltd.
    Inventors: Masashi Shiraishi, Koichi Miyagawa
  • Color cathode ray tube having electrostatic quadrupole lenses
    Patent number: 6472808
    Abstract: A color cathode ray tube includes third, fourth and fifth electrodes and an anode in its electron beam focusing section.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: October 29, 2002
    Assignee: Hitach, Ltd.
    Inventors: Go Uchida, Shoji Shirai, Shinichi Kato, Koichi Miyagawa