Patents by Inventor Steven W. Noriyuki

Steven W. Noriyuki 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).

  • Irrigation line drain valve
    Patent number: 5193578
    Abstract: The invention is an automatic drain valve for irrigation pipelines. The valve is located at the end of the pipe, and comprises a pivoted, spring lever attached to the outside of the pipe and attached to a valve stem and seat.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: March 16, 1993
    Inventor: Steven W. Noriyuki