Patents by Inventor David B. Harrell

David B. Harrell 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).

  • Method and apparatus for monitoring the autonomic nervous system
    Patent number: 7024234
    Abstract: An apparatus and method for detection and monitoring of autonomic nervous system (ANS) activity in humans, primarily in the field of sleep research. The present invention discloses a portable, simple, and cost-effective electronic device containing hardware and software that permits real-time monitoring of a pulsatile blood volume waveform obtained through use of a photoplethysmographic (optical volume detecting) probe, thereby allowing signal conditioning, waveform slope analysis, display, recording, and output of pulse transitional slope data representative of activity in the ANS.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: April 4, 2006
    Inventors: Lyle Aaron Margulies, David B. Harrell, Michael Riggins
  • Method and apparatus for monitoring the autonomic nervous system
    Publication number: 20040059236
    Abstract: An apparatus and method for detection and monitoring of autonomic nervous system (ANS) activity in humans, primarily in the field of sleep research. The present invention discloses a portable, simple, and cost-effective electronic device containing hardware and software that permits real-time monitoring of a pulsatile blood volume waveform obtained through use of a photoplethysmographic (optical volume detecting) probe, thereby allowing signal conditioning, waveform slope analysis, display, recording, and output of pulse transitional slope data representative of activity in the ANS.
    Type: Application
    Filed: September 19, 2003
    Publication date: March 25, 2004
    Inventors: Lyle Aaron Margulies, David B. Harrell, Michael Allen Riggins