Patents by Inventor James C. Gregory

James C. Gregory 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).

  • Detection of signals transmitted by frequency-shift keying modulation techniques
    Patent number: 6724836
    Abstract: An apparatus and method of detecting signals transmitted via frequency-shift keying techniques. An observation window encompassing a frequency band is defined and searched for received tones, the frequency spacing between received tones is calculated and compared to known FSK modulation techniques to determine whether at least part of a transmission is potentially present. The transmission may be an automatic link establishment signal. A histogram can store data on received tones. The observation window can be shifted to center a potential FSK transmission for parallel modem processing that will attempt to demodulate and decode it.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: April 20, 2004
    Assignee: Rockwell Collins
    Inventors: Joseph T. Graf, James C. Gregory
  • Swing
    Patent number: D281376
    Type: Grant
    Filed: May 16, 1983
    Date of Patent: November 19, 1985
    Inventor: James C. Gregory, III