Patents by Inventor Didier Thollon

Didier Thollon 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).

  • Geophone with a sensitive element made of piezoelectric polymer
    Patent number: 4839872
    Abstract: A geophone designed to measure the vibrations of bodies, especially vibrations in the earth's crust, comprises two-strip sensors made of piezoelectric polymer, embedded by one end in the geophone casing and resting freely, by one side, on the inertial mass of the geophone, thus enabling the making of geophones with a very wide pass-band.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: June 13, 1989
    Assignee: Thomson-CSF
    Inventors: Claude Gragnolati, Didier Thollon, Jean-Georges Malcor