Patents by Inventor Nobuyasu Hatsuoka

Nobuyasu Hatsuoka 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).

  • Spring steel for vehicles
    Patent number: 4409026
    Abstract: A spring steel for vehicles having a composition substantially composed of 0.5-0.7 wt % of C, 1.0-1.8 wt & of Si, 0.1-1.0 wt % of Mn, below 0.7 wt % of Cr, 0.03-0.5 wt % of V and the balance of Fe and normally present impurities, and optionally at least one of Al, Zr, Nb and Ti each contained in an amount of 0.02-0.1 wt %.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: October 11, 1983
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Yoshiro Yamada, Nobuyasu Hatsuoka, Shinzo Ashida
  • High strength steel rod of large gauge
    Patent number: 4123296
    Abstract: A large gauge high strength steel rod having a diameter of not less than 9 mm, is produced from high carbon steel containing, by weight percent, from 0.65 to 0.90% carbon and from 0.15 to 1.5% chromium capable of being drawn without subsequent heat treatment.
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: October 31, 1978
    Assignee: Kobe Steel, Ltd.
    Inventors: Noboru Yamakoshi, Tsugio Kaneda, Nobuyasu Hatsuoka, Shinichi Shimazu, Tatsu Fujita, Yoshiro Yamada, Tetsuo Yamada, Atsuo Mizuta
  • Method of producing large diameter steel rods
    Patent number: 4046600
    Abstract: A large gauge high strength steel rod having a diameter of not less than 9 mm, is produced from high carbon steel containing, by weight percent, from 0.65 to 0.90% carbon and from 0.15 to 1.5% chromium capable of being drawn without subsequent heat treatment.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: September 6, 1977
    Assignee: Kobe Steel Ltd.
    Inventors: Noboru Yamakoshi, Tsugio Kaneda, Nobuyasu Hatsuoka, Shinichi Shimazu, Tatsu Fujita, Yoshiro Yamada, Tetsuo Yamada, Atsuo Mizuta