Patents by Inventor Dave Graen

Dave Graen 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).

  • R-wave detector circuit for sensing cardiac signals
    Patent number: 6377844
    Abstract: Method and apparatus for measuring the heart rate in a human body. A first and second derivative of an electrical signal from the heart known as the QRS complex or R-wave is measured, and the values of the peak of the R-wave, the peak of the first derivative of the R-wave, and the peak of the second derivative of the R-wave are determined. The three peak values are then multiplied together to provide an output responsive to the occurrence of the R-wave which is greater than either the value of the peak of the R-wave, the value of the peak of the first derivative of the R-wave, or the value of the peak of the second derivative of the R-wave.
    Type: Grant
    Filed: March 13, 1999
    Date of Patent: April 23, 2002
    Inventor: Dave Graen