Patents by Inventor Francoise Florence Dufour

Francoise Florence Dufour 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).

  • Gas flow generator
    Patent number: 7550034
    Abstract: A gas flow generator comprising: an ultrasonic driver comprising a piezoelectric or electrostrictive transducer mounted on a substrate, operation of the transducer being arranged to cause the driver to bend; a first membrane disposed on or formed integrally with the transducer or the substrate; and a second membrane mounted substantially parallel with the driver and spaced a given distance therefrom, one of the membranes being perforate, whereby ultrasonic bending of the driver on actuation of the transducer causes a gas flow through the perforate membrane.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: June 23, 2009
    Assignee: The Technology Partnership PLC
    Inventors: Richard Wilhelm Janse Van Rensburg, Robert Gordon Maurice Selby, Francoise Florence Dufour, Justin Rorke Buckland, John Matthew Somerville