Patents by Inventor Manabu Hatakeyama

Manabu Hatakeyama 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).

  • Acceleration sensor
    Patent number: 5248861
    Abstract: An acceleration sensor is disclosed, which comprises a movable permanent magnet, a case of a non-magnetic material having a space with the movable permanent magnet movable therein, a magnetic yoke provided on the case and extending in a direction crossing the directions of movement of the movable permanent magnet, and a lead switch for forming a closed magnetic circuit together with the movable permanent magnet and magnetic yoke, the lead switch being turned on and off with a movement of the movable permanent magnet caused due to an acceleration produced by shocks or vibrations.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: September 28, 1993
    Assignee: TDK Corporation
    Inventors: Tomio Kato, Manabu Hatakeyama