Patents by Inventor Anne J. C. J. van Leeuwen

Anne J. C. J. van Leeuwen 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 altering the Q of an implantable medical device telemetry antenna
    Patent number: 5766232
    Abstract: A method and apparatus for programming implantable medical devices employing RF telemetry, and more particularly, altering the RF telemetry antenna Q to accommodate telemetry with implantable medical devices having differing RF telemetry receiving characteristics is disclosed. The RF head telemetry antenna comprises an LC tank circuit including an RF head telemetry coil and a tuning capacitor and has a predetermined antenna Q. The RF head telemetry antenna is adapted to be driven into oscillation by applied oscillating energy and to continue to oscillate in a series of declining amplitude oscillations after the oscillating energy is no longer applied as residually stored oscillating energy is dissipated therethrough. A transmit telemetry pulse is generated for establishing a pulse width of the telemetry RF pulse. Upon the termination of the telemetry transmit pulse antenna Q is reduced from the predetermined antenna Q, and the declining amplitude oscillations are thereby attenuated.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: June 16, 1998
    Assignee: Medtronic, Inc.
    Inventors: John J. Grevious, Anne J. C. J. van Leeuwen, Mark W. Sandberg, Kenneth L. Graves