Patents by Inventor Takeshi Takazuka

Takeshi Takazuka 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).

  • Method of mixing steel fiber reinforced concrete
    Patent number: 4159911
    Abstract: A method of mixing a steel fiber reinforced concrete comprising the steps of subjecting steel fibers each having a surface to weight ratio of over 900 mm.sup.2 /g to a pretreatment so as to orientate said steel fibers in a predetermined direction, randomly directing said orientated steel fibers through grating means having a grating space which is about two to four times the length of each of said steel fibers, and thereby introducing said steel fibers into components of a concrete or into an uncured concrete made up of the same.
    Type: Grant
    Filed: February 23, 1978
    Date of Patent: July 3, 1979
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventor: Takeshi Takazuka