Patents by Inventor Sydney P. Bradfield, III

Sydney P. Bradfield, 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).

  • Unbalanced quadriphase demodulator
    Patent number: 4027265
    Abstract: A new and improved apparatus and method for demodulation of quaternary phase shift keyed (QPSK) data, particularly unbalanced QPSK, with phase adjustment of the output of a phase-locked loop local oscillator to reduce sensitivity to amplitude variations internal to the demodulator.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: May 31, 1977
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Herbert S. Kobayashi, Sydney P. Bradfield, III