Patents by Inventor Hidekazu Tsubone

Hidekazu Tsubone 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).

  • Vibration-damping composite sheet steel
    Patent number: 5093204
    Abstract: A vibration-damping composite sheet steel made by sandwiching a viscoelastic material between two steel sheets. A rust proofing coating which generates no gaseous matter is formed on one surface of each of the steel sheets which is contacted with the viscoelastic material. The coating is a phosphate coating having no water of crystallization with a coating weight per unit area of 0.5 g/m.sup.2 or over, or a galvanized zinc coating including no zinc oxide.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: March 3, 1992
    Assignees: Nippon Kokan Kabushiki Kaisha, Mazda Motor Corporation
    Inventors: Yukichi Watanabe, Tomeji Doi, Masafumi Yoshida, Hidekazu Tsubone, Norio Chiba, Kunio Kawasaki, Masahiro Dohi, Hiroshi Kodama, Yoshitaka Takamiya