Patents by Inventor Lucien Bertacchini

Lucien Bertacchini 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).

  • Clock control device for a non-disruptive backup clock switching
    Patent number: 6341149
    Abstract: A clock control system in a network switching node including an internal reference clock of a low level Stratum and receiving a plurality of high level Stratum clocks (CLOCK 1, CLOCK 2, CLOCK n) from connection lines, one of these high level Stratum clocks being currently used to generate a Master Clock; the device selecting another high level Stratum clock when the clock currently used to generate the Master Clock fails and comprising for each high level Stratum clock, means (12, 16, 20) for phase locking the reference clock on the selected high level Stratum clock and obtaining a plurality of phase locked (PLL) reference clocks (SOURCE 1, SOURCE 2, SOURCE n).
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: January 22, 2002
    Assignee: International Business Machines Corporation
    Inventors: Lucien Bertacchini, Michel Chicherio, Jacques Fieschi, Jean-Francois Le Pennec