Patents Represented by Attorney W. F. Simpson

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  • Multiplex communication system employing pulse code modulation
    Patent number: 4396801
    Abstract: 1.
    Type: Grant
    Filed: June 11, 1946
    Date of Patent: August 2, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: James O. Edson, Theodore F. Gleichmann, Charles O. Mallinckrodt
  • PCM communication system with pulse deletion
    Patent number: 3991268
    Abstract: 1. A pulse code modulation system, including a source of intelligence conveying code groups of pulse elements of pulse code modulated signals, apparatus for suppressing individual pulse elements of said code groups of pulse elements of said pulse code modulated signals at recurring intervals of time, means for transmitting other signals during said intervals during which said pulses are suppressed, and receiving apparatus for recovering said other signals from said pulse code modulation signals.
    Type: Grant
    Filed: December 24, 1948
    Date of Patent: November 9, 1976
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: William M. Goodall