Patents by Inventor Francesco Shiavoni

Francesco Shiavoni 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).

  • Wavelength division multiplex optical ring network for transmitting protected signals by local state switching following local interruption detection
    Patent number: 7805072
    Abstract: Wavelength division multiplex ring communication network equipment comprises a first multiplexer connected to a first optical fiber portion dedicated to transporting multiplexed signals and a second multiplexer connected to a second optical fiber portion. The equipment comprises signal protection circuitry connected to the first and second multiplexers and to a terminal which, in the event of local detection of interruption of signal transmission at a first wavelength on the first optical fiber portion, send the signals coming from the terminal to the second multiplexer at a second wavelength so that it communicates them to the second optical fiber portion, and sends to the terminal the signals that are addressed to it and that come from the second optical fiber portion at the second wavelength.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: September 28, 2010
    Assignee: Alcatel
    Inventors: Stéphane Lovisa, Fabio Tassara, Francesco Shiavoni