Patents by Inventor Francois Rene Vaillant

Francois Rene Vaillant 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 and device for detecting occupancy of telecommunication channels
    Patent number: 4004101
    Abstract: A system for detecting the occupancy of the channels of a telecommunication network and monitoring the transmission of signals, wherein the signals on a telephone line are sampled to detect the quasi-periodic nature of speech signals for long enough to differentiate them from noise signals of a random nature.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: January 18, 1977
    Assignee: Societe Anonyme de Telecommunications
    Inventor: Francois Rene Vaillant