Patents by Inventor John W. Playford

John W. Playford 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 wires and cables and conductors for use in them
    Patent number: 5430255
    Abstract: An electric wire or cable having at least one aluminum conductor with extruded insulation with or without a semiconducting extruded screen or screens has the surface of the metallic conductor textured to provide a mechanical interlock with extruded material applied closely to it. This reduces the effect of shrink-back when the wire or cable is cut back for termination or jointing, and may thus allow faster extrusion in manufacture.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: July 4, 1995
    Assignee: Phillips Cables Limited
    Inventors: Ian G. Downie, John W. Playford