Patents by Inventor Tuyoshi Yoshino

Tuyoshi Yoshino 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).

  • Method for making permanent magnet type demagnetizing head
    Patent number: 5078944
    Abstract: A permanent magnet type demagnetizing head is made by successively molding a resin-magnet which forms a body having a magnetic member forming a part of a tape contact surface and a resin which forms protection member forming a remainder part of the tape contact surface, and therefore a manufacturing process is simplified, and further quality of the demagnetizing head is improved, since size precision is enhanced.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: January 7, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Tuyoshi Yoshino
  • Permanent magnet type erasing head
    Patent number: 4965688
    Abstract: A permanent magnet type demagnetizing head is made by successively molding a resin-magnet which forms a body having a magnetic member forming a part of a tape contact surface and a resin which forms protection member forming a remainder part of the tape contact surface, and therefore a manufacturing process is simplified, and further quality of the demagnetizing head is improved, since size precision is enhanced.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: October 23, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Tuyoshi Yoshino