Patents by Inventor Maurice Lienard

Maurice Lienard 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).

  • Device for developing a neutralization signal for an echo suppressor
    Patent number: 3935403
    Abstract: The invention comes within the branch of digital data transmission on a telephone line having four wires comprising echo suppressors. In order to be able to neutralize these suppressors during a simultaneous bilateral data transmission, a neutralization signal is developed in a purely digital device basically using a PCM coder, counting the changes in sign of the line signal. The use of digital filters to identify the characteristic frequency preceding the transmission is thus avoided.
    Type: Grant
    Filed: August 6, 1974
    Date of Patent: January 27, 1976
    Assignee: Compagnie Industrielle des Telecommunications Cit-Alcatel
    Inventors: Etienne Penicaud, Maurice Lienard