Patents by Inventor Bernard Danneville

Bernard Danneville 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).

  • Method of automatic duplex or semi-duplex communication for two units via a telephone line
    Patent number: 5867487
    Abstract: Apparatus and methods for establishing half-duplex communication between a first unit and a second unit over a telephone line. The first unit may transmit a first matching signal stream, the first matching signal stream including a first conditioning segment and a first unmodulated carrier signal having a first characteristic carrier frequency, the first characteristic carrier frequency representing a given transmission mode, the given transmission mode being in half-duplex. The second unit may analyze the first characteristic carrier frequency to recognize the given transmission mode.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: February 2, 1999
    Assignees: France Telecom, Telediffusion DeFrance
    Inventors: Olivier Normand, Jean-Pierre Martiniere, Bernard Danneville