Patents by Inventor William J. McCallum, III

William J. McCallum, III 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).

  • Flexible dielectric fiber optic drop cable
    Patent number: 5408561
    Abstract: An optical service cable has a flexural modulus of elasticity of less than 300 MPa. Water absorptive and strength members are laid over a light waveguide core. The cable is suitable for buried service cable applications.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: April 18, 1995
    Assignee: Siecor Corporation
    Inventors: William J. McCallum, III, Gregory A. Mills, Ilona W. Schmidt
  • Elevator cable hanger
    Patent number: 5080199
    Abstract: An improved elevator cable hanger, which may be mounted either to an elevator car or to the motor room end of an elevator traveling cable, includes a single unitary metallic bracket having support means for supporting an elavator cable strength member, a plate mounted to an exterior surface, and a curved member providing lateral support to an elevator cable hanging straight from the support means. At least one strap secures the elevator cable to the bracket and a friction material mounted to the curved member prevents cable rotation during movement of the elevator car.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: January 14, 1992
    Assignee: Siecor Corporation
    Inventor: William J. McCallum, III