Patents by Inventor André G. Routh

André G. Routh 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).

  • Spider-less loudspeaker with active restoring apparatus
    Patent number: 6694037
    Abstract: A spider-less and suspension-less speaker system, having a diaphragm constrained to move in a linear direction and supported by a frictionless or low friction support. A voice coil coupled to an audio input drives the speaker diaphragm. A position sensor determines the physical position of the diaphragm. A control circuit uses the sensed position information to modify the audio signal in such a way that the interaction of the voice coil and the magnetic field both drives the diaphragm to produce an audible output and restores the diaphragm to a neutral position in the absence of a further audio signal.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: February 17, 2004
    Inventors: Robert Steven Robinson, William B. Rottenberg, André G. Routh
  • Implantable medical device responsive to heart rate variability analysis
    Patent number: 6571121
    Abstract: A method and apparatus for evaluating heart rate variability of the heart of a person in order to forecast a cardiac event. A cardiac stimulator receives heart beat signals from the heart and determines a measurement of heart rate variability based on statistical data derived from the heart beat signals and sensing data derived from a sensor. This measurement of heart rate variability is compared with previously stored heart rate variability zones defining normal and abnormal heart rate variability. These zones are modifiable after the occurrence of a cardiac event. Once a cardiac event is detected, a pathway is computed which extends from a generally normal heart rate variability condition to an abnormal heart rate variability condition. Subsequent measurements of heart rate variability are compared with this pathway. Selective therapy regimes are initiated depending on the measurement of heart rate variability.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: May 27, 2003
    Assignee: Intermedics Inc.
    Inventors: Edward A. Schroeppel, David Prutchi, André G. Routh
  • Implantable medical device responsive to heart rate variability analysis
    Patent number: 6571122
    Abstract: A method and apparatus for evaluating heart rate variability of the heart of a person in order to forecast a cardiac event. A cardiac stimulator receives heart beat signals from the heart and determines a measurement of heart rate variability based on statistical data derived from the heart beat signals and sensing data derived from a sensor. This measurement of heart rate variability is compared with previously stored heart rate variability zones defining normal and abnormal heart rate variability. These zones are modifiable after the occurrence of a cardiac event. Once a cardiac event is detected, a pathway is computed which extends from a generally normal heart rate variability condition to an abnormal heart rate variability condition. Subsequent measurements of heart rate variability are compared with this pathway. Selective therapy regimes are initiated depending on the measurement of heart rate variability.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: May 27, 2003
    Assignee: Intermedics Inc.
    Inventors: Edward A. Schroeppel, David Prutchi, André G. Routh