Patents by Inventor Sosuke Watanabe

Sosuke Watanabe 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).

  • Water discharge device for use with irrigation systems
    Patent number: 3958761
    Abstract: A water discharge device for use with irrigation systems, comprising a tubular element formed with female threads at the inside surface thereof and a screw element formed with male threads at the outside surface threof, the height of said female threads being different from that of said male threads, whereby a helical passage is formed along the female and male threads, through which water is moderately discharged under reduction of pressure.
    Type: Grant
    Filed: June 7, 1973
    Date of Patent: May 25, 1976
    Assignee: Hitachi Chemical Company, Ltd.
    Inventor: Sosuke Watanabe