Patents by Inventor Solange Bernard

Solange Bernard 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).

  • Loudspeaker telephone
    Patent number: 4225754
    Abstract: A loudspeaking telephone has a differential coupler (3) connecting a two-way two-wire telephone line (4) to separate transmission and reception channels (1 and 2 respectively) including respectively a microphone (5) and a loudspeaker (7). A first transversal filter (10) synthesizes an acoustic echo signal ya which is subtracted from the microphone signal to deliver a substantially echo-free signal to the transmission channel. Likewise a second transversal filter (11) synthesizes an electrical echo signal to deliver a substantially echo-free signal to the reception channel.
    Type: Grant
    Filed: November 16, 1978
    Date of Patent: September 30, 1980
    Assignee: Compagnie Industrielle des Telecommunications Cit-Alcatel
    Inventors: Solange Bernard, Dominique Lajotte, Francois Michelon, Jacques Sourgens