Patents by Inventor Christopher D. Stark

Christopher D. Stark 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).

  • Repeater supervision
    Patent number: 5271035
    Abstract: An arrangement for signalling to supervisory equipment in a repeater in a digital transmission system. A digital data test sequence comprising a plurality of multi-bit words each accompanied by a parity check bit is fed to the transmission systems. Digital supervisory signals modulate the test sequence and periodic parity violations are imposed on the test sequence. A first counter counts the periodic violations imposed on the test sequence and a second like counter counts errors in the test signals returned from the system.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: December 14, 1993
    Assignee: STC Limited
    Inventors: Robert J. Cole, Christopher D. Stark