Patents by Inventor Henri Symolon

Henri Symolon 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 and system for controlling a frequency via an asynchronous transmission network and mobile telephone network including the system
    Patent number: 6819685
    Abstract: In a method of controlling a frequency via an asynchronous transmission network, signals received at the output of the asynchronous transmission network have been clocked at a reference frequency and transmitted by the network with respective varying transit delays and the frequency of a local clock is slaved to the reference frequency by means of an error signal formed from selected received signals with minimal transit delays. Applications include local mobile telephone networks.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: November 16, 2004
    Assignee: Alcatel
    Inventors: Rabih Abouchakra, Henri Symolon, Gérard Vergnaud, Raphaël Roux