Patents by Inventor Tomota Ieyasu

Tomota Ieyasu 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).

  • Noncontact type IC card and system therefor
    Patent number: 6343744
    Abstract: A noncontact type IC card includes an electromagnetic induction coil, integrated circuit, and switch. The electromagnetic induction coil receives the energy of an electromagnetic field radiated from an external device. The integrated circuit can be operated by driving power supplied by the energy of the electromagnetic field. The switch is provided on the electromagnetic induction coil for receiving the energy of the electromagnetic field and switches the inductance of the electromagnetic induction coil.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: February 5, 2002
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Tsugumichi Shibata, Tadao Takeda, Toshinori Fukunaga, Tomota Ieyasu