Patents by Inventor Robert F. Armstrong

Robert F. Armstrong 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).

  • Longitudinally wrapped cable
    Patent number: 4644098
    Abstract: Disclosed is an electric service entrance cable comprising parallel insulated conductors, helically covered by evenly distributed uninsulated conductors, covered by longitudinally wrapped polyester glassed-backed reinforcement tape bound by helically wrapped fiberglass strand and an outer covering.
    Type: Grant
    Filed: January 18, 1985
    Date of Patent: February 17, 1987
    Assignee: Southwire Company
    Inventors: Daniel A. Norris, James O. Lowery, Robert F. Armstrong