Patents by Inventor Masamitu Nishina

Masamitu Nishina 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).

  • Position shift apparatus
    Patent number: 4313141
    Abstract: A position shift apparatus having an actuator section for moving up and down a magnetic head through a screw feeding, and a control section in which, when the screw feeding is made in the up direction, it is made by a given distance up to target position and, when in the down direction, it is made beyond the target position, and then is again made by the distance exceeding the target position in the up direction. Even if the head is positioned on either the lower or the upper side, the head is screw-fed toward the target position always in the up direction.
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: January 26, 1982
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Seiichi Yanagida, Hisaharu Takeuchi, Masamitu Nishina