Patents by Inventor Frank Michell

Frank Michell 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).

  • Excitation of air directing valves and air handling surfaces in the cancellation of air handling system noise
    Publication number: 20070125592
    Abstract: A piezoelectric vibrator generates attenuating waves in an air duct in an automobile HVAC system to cancel or reduce the noise created by sound waves. A processor converts a sinusoidal noise signal into an attenuation signal, which is the additive inverse of the sinusoidal noise signal. The processor may include an inverter or a phase-shifter to create the attenuation signal, as well as an amplifier to adjust the amplitude of the attenuation signal. The attenuation signal drives the piezoelectric vibrator.
    Type: Application
    Filed: December 7, 2005
    Publication date: June 7, 2007
    Inventors: Frank Michell, Paul Urban