Patents by Inventor Robert S. F. Clarke

Robert S. F. Clarke 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).

  • Optical fiber cable
    Patent number: 4832441
    Abstract: An optical fiber cable package has a kingwire and a plurality of acrylate primary coated optical fibers all embedded in a one-shot extrusion of low melting point plastic, e.g. Hytrel 40. The fibers have a zero angle of lay. The package is particularly but not exclusively suitable for use in an optical fiber submarine cable.
    Type: Grant
    Filed: June 13, 1986
    Date of Patent: May 23, 1989
    Assignee: STC PLC
    Inventors: Stuart R. Barnes, Ralph Sutehall, Robert S. F. Clarke
  • Optical fiber cable
    Patent number: 4715676
    Abstract: A design of optical fiber cable that is gas blocking has a set of four plastics packaged optical fibers (2) around a central strength member (1). The fibers and strength members are embedded in spaced apart relationship in a nylon 12 pressure extruded sheath (3) which has been annealed to provide a contraction in the region of 1/4%.
    Type: Grant
    Filed: November 5, 1985
    Date of Patent: December 29, 1987
    Assignee: STC plc
    Inventors: Ralph Sutehall, Robert S. F. Clarke