Patents by Inventor Mark James Griffiths

Mark James Griffiths 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).

  • Monitoring electrical activity
    Patent number: 6748263
    Abstract: A method and apparatus for monitoring electrical activity, such as brainwaves, in an animal comprising detecting said activity to produce a corresponding output signal, combining the output signal with a random noise signal to produce a modified signal, and analyzing the modified signal using an autocorrelation technique to detect the relative power density values at a plurality of different frequencies. The random noise signal may be a random number. The autocorrelation technique may involve the Yule-Walker method.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: June 8, 2004
    Assignee: The University of Bristol
    Inventors: Mark James Griffiths, Alan W Preece
  • Monitoring electrical activity
    Publication number: 20030109796
    Abstract: A method and apparatus for monitoring electrical activity, such as brainwaves, in an animal comprising detecting said activity to produce a corresponding output signal, combining the output signal with a random noise signal to produce a modified signal, and analysing the modified signal using an autocorrelation technique to detect the relative power density values at a plurality of different frequencies. The random noise signal may be a random number. The autocorrelation technique may involve the Yule-Walker method.
    Type: Application
    Filed: October 8, 2002
    Publication date: June 12, 2003
    Inventors: Mark James Griffiths, Alan W Preece