Patents by Inventor Hirotaka Sunada

Hirotaka Sunada 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).

  • Surface treating method by electric discharge
    Patent number: 5858479
    Abstract: A surface treating method uses an electric discharge machining to form a coating layer having strong adhesion and excellent characteristics on a metal surface such as a hard metal. A discharge electrode is formed by powders containing metal hydride. Electric discharge is generated in a working fluid containing carbon between the discharge electrode and a workpiece. Thus, a coating layer of the metal hydride is formed on a surface of the workpiece.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: January 12, 1999
    Assignees: Japan Science and Technology Corporation, Nagao Saito, Naotake Mouri, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Nagao Saito, Naotake Mouri, Hirotaka Sunada, Takuji Magara, Akihiro Goto