Patents by Inventor Murphy Shirley

Murphy Shirley 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).

  • Electric livestock guard
    Patent number: 5072915
    Abstract: An electric livestock guard or gate for prohibiting the passage of livestock through a roadway opening in a fenced enclosure and which includes a base portion of interlocking segments over which a metallic grid is suspended by springs which mount each end of the grid to spaced insulators carried by the base portion.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: December 17, 1991
    Inventor: Murphy Shirley