Patents by Inventor Munehiro Ichikawa

Munehiro Ichikawa 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).

  • Switching device
    Patent number: 4825181
    Abstract: A switching device comprising a reed switch of a normal open type turned on and off by a magnetic field, a fixed bias magnet located in an area where the switch operates stably, and a starting magnet located opposite to the fixed bias magnet with the switch interposed between them and capable of applying a magnetic field, reverse to that of the fixed bias magnet, to the switch. When the starting magnet is carried close to the switch, its a magnetic field overcomes that of the fixed bias magnet to control the switching-on and -off of the switch, and when it is carried remote from the swtich, the fixed bias magnet controls the switching-on and -off of the switch.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: April 25, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Suketoshi Nagano, Munehiro Ichikawa, Takashi Yoneyama