Patents by Inventor Sueyuki Yahagi

Sueyuki Yahagi 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).

  • Thin DC-DC converter arrangement
    Patent number: 5621636
    Abstract: A thin DC-DC converter arrangement which includes an inductor including a thin ring-shaped coil having a hole in its center and a thin ferrite core for providing a closed magnetic path passing through the central hole of the coil and interlinking the ring-shaped coil, a thin circuit board formed on its one surface with an electric circuit of the DC-DC converter, and a radiator having at least one flat part, wherein the inductor, the circuit board and the radiator are integrally assembled.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: April 15, 1997
    Assignee: Nippon Steel Corporation
    Inventors: Kenichi Tanigawa, Hosei Hirano, Shingo Katayama, Nobuyoshi Tanaka, Sueyuki Yahagi