Patents by Inventor Laurance P. Longtin

Laurance P. Longtin 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).

  • Chaotic communication system and method using modulation of nonreactive circuit elements
    Patent number: 7245723
    Abstract: A chaotic communication system employs transmitting and receiving chaotic oscillating circuits. One improvement to first-generation systems is the ability to modulate a nonreactive element in the transmitting circuit, thus increasing modulation bandwidth. Other features include insertion of a gain control amplifier in a chaotic receiver; signal filtering in chaotic transmitters and receivers; use of chaotic modulation techniques for cellular telephony applications; dual-transmitter and receiver systems; a dual receiver synchronization detector; interfaces to communication systems; analog chaotic signal modulation; use of multiple chaotic transmitters and receivers; digital algorithm improvement using a cube-law nonlinear component; a Gb-only receiver; a Gb-only transmitter; and positive slope transmitter and receiver systems.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: July 17, 2007
    Assignee: Science Applications International Corporation
    Inventors: Daniel E Hinton, Sr., Nelson R Dew, Laurance P Longtin, Charles P Gardner, Shannon W Martin, Michael C Edwards, Antwong L Berkley, Steven M Bowser
  • Chaotic communication system and method using modulation of nonreactive circuit elements
    Patent number: 6980656
    Abstract: A chaotic communication system employs transmitting and receiving chaotic oscillating circuits. One improvement to first-generation systems is the ability to modulate a nonreactive element in the transmitting circuit, thus increasing modulation bandwidth. Other features include insertion of a gain control amplifier in a chaotic receiver; signal filtering in chaotic transmitters and receivers; use of chaotic modulation techniques for cellular telephony applications; dual-transmitter and receiver systems; a dual receiver synchronization detector; interfaces to communication systems; analog chaotic signal modulation; use of multiple chaotic transmitters and receivers; digital algorithm improvement using a cube-law nonlinear component; a Gb-only receiver; a Gb-only transmitter; and positive slope transmitter and receiver systems.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: December 27, 2005
    Assignee: Science Applications International Corporation
    Inventors: Daniel E. Hinton, Sr., Nelson R. Dew, Laurance P. Longtin, Charles P. Gardner, Shannon W. Martin, Michael C. Edwards, Antwong L. Berkley, Steven M. Bowser