Patents by Inventor Richard Palmer Slade

Richard Palmer Slade 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).

  • Fault locating apparatus for digital transmission system
    Patent number: 4022988
    Abstract: Defective repeaters in a multihop, digital microwave transmission system are located by the use of a special test pattern which is generated at the transmitting terminal. At each repeater station, the two outputs of the phase demodulator are compared to determine if the test pattern has been properly received from the upstream repeaters. The special test pattern, S, has the characteristic that S = S(2N); that is to say, the test pattern equals the complement of itself delayed by 2N symbols. This special characteristic makes it unnecessary to employ a differential decoder in the test apparatus at each repeater station.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: May 10, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: George Howard Lentz, Richard Palmer Slade