Patents by Inventor Hitoshi Teshigahara

Hitoshi Teshigahara 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).

  • Hot pressure welding of hot steel stock
    Patent number: 5509600
    Abstract: A method of hot pressure welding of hot steel stock, in which the ends of the steel stock are descaled mechanically and pressure joined under a reducing flame. Since re-oxidation after descaling is prevented and the feasible temperature for hot pressure joining is maintained by the reducing flame, the joining is accomplished firmly and strong joints are obtained.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: April 23, 1996
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Seiji Okada, Yutaka Suzuki, Kouichi Sakamoto, Hitoshi Teshigahara, Takao Taka, Yasuto Fukada, Masami Oki