Patents by Inventor Chikara Fujii

Chikara Fujii 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-rolled steel sheet of high cold formability and method of producing such steel sheet
    Patent number: 4011106
    Abstract: A hot-rolled steel sheet of high cold formability characterized in that it contains of 0.03-0.30 % C and 0.15-2.0 % Mn as the main ingredients and also by the average length of sulfide inclusions of stringer form and/or silicate inclusions of like form being less than 100 .mu..
    Type: Grant
    Filed: June 18, 1975
    Date of Patent: March 8, 1977
    Assignee: Nippon Steel Corporation
    Inventors: Hiroshi Takechi, Hiroaki Masui, Chikara Fujii, Tsuyoshi Kawano, Kazuo Koyama