Patents by Inventor Ryozo Karatsu

Ryozo Karatsu 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).

  • Metallic printed board
    Patent number: 5316831
    Abstract: A metallic printed board having layers including a metallic plate, an electric insulating layer and a metallic film, includes a plurality of insulating regions in the electric insulating layer. The insulating regions have different dielectric or thermal properties and are formed of a number of kinds of electric insulating materials having the different dielectric or thermal properties respectively. The insulating regions are arranged on an identical plane surface of the metallic plate.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: May 31, 1994
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yukio Nakajima, Kazuhiko Imamura, Ryozo Karatsu, Sumio Nishizaki, Makoto Kobayashi