Patents by Inventor Leon E. Davis

Leon E. Davis 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).

  • Sight check valve
    Patent number: 4022245
    Abstract: A swing type check valve is connected by a double compression coupling to an irrigation pipe. The compression sleeve over the valve is transparent so that the valve may be sight checked or visually inspected.
    Type: Grant
    Filed: April 8, 1976
    Date of Patent: May 10, 1977
    Assignee: Devin S. Davis
    Inventor: Leon E. Davis