Patents by Inventor Edwin E. Greigg

Edwin E. Greigg 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).

  • Patent number: 4099387
    Abstract: The invention relates to a method and apparatus for producing steel piling and a machine for driving the same in earthen strata and further teaches fabrication of the steel piling either by a rolling mill or an extrusion machine, said piling being provided with integral portions that are later deformed to produce longitudinally extending ducts that are suitably pierced to jet streams of water carried by the ducts to the opposed sides of a section of piling.
    Type: Grant
    Filed: December 3, 1976
    Date of Patent: July 11, 1978
    Inventors: Leonard L. Frederick, Edwin E. Greigg