Patents by Inventor Patrick Levesque

Patrick Levesque 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).

  • Patent number: 4199990
    Abstract: The invention relates to accelerometers comprising a vibrating elastic body associated with an electrical oscillator for maintaining its oscillations and a frequency measuring device for measuring its frequency. More particularly, the invention relates to an accelerometer in which the vibrations are in the form of elastic surface waves propagated along one face of a wafer of piezoelectric material cemented to a substrate. Measurement of the acceleration is based on the measurement of a frequency deviation or phase shift undergone by the elastic surface waves.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: April 29, 1980
    Assignee: Thomson-CSF
    Inventors: Michel Valdois, Patrick Levesque, Pierre Hartemann