Patents by Inventor Michel Quivy

Michel Quivy 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).

  • Low frequency acoustical piezo-electric transducer
    Patent number: 4031418
    Abstract: A piezo-electric transducer for low frequency acoustical waves comprising a stack of piezo-electric elements and alternating electrodes disposed between a front receiver plate and a counter mass. The countermass comprises a rigid annular block surrounding the stack, a rear plate engaging the rear of the stack and an elastic connection between the block and the rear plate.
    Type: Grant
    Filed: September 3, 1975
    Date of Patent: June 21, 1977
    Assignee: Etat Francais
    Inventors: Philippe Cluzel, Michel Quivy, Bernard Tocquet