Patents by Inventor Julian G. Head

Julian G. Head 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).

  • Extra-high-voltage power cable
    Patent number: 4997995
    Abstract: An extra-high-voltage power cable is provided with extruded insulation 3 over a conductor 1 thereof. The insulation comprises an inner layer 5 of an unfilled high density polyethylene or polypropylene material having a higher electric strength than the material of the insulation adjacent thereto in an outer layer 6 thereof.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: March 5, 1991
    Assignee: Pirelli General plc
    Inventors: Malcolm A. Simmons, Julian G. Head