Patents by Inventor Jean-Francois Dulck

Jean-Francois Dulck 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).

  • Communications system with moving bodies with the aid of satellites
    Patent number: 4943808
    Abstract: The system comprises at least two geosynchronous satellites (S-A, S-B) having the same elliptical orbit and the same trace on the ground. The longitudes of ascending node are displaced. The moving bodies have a vertically pointed fixed antenna. The system operates for 24 hours continuously with one or other of the satellites.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: July 24, 1990
    Assignee: Centre National d'Etudes Spatiales
    Inventors: Jean-Francois Dulck, Denis Rouffet