Patents by Inventor Jean C. Vuillemin

Jean C. Vuillemin 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 for testing a digital data transmission line between two modems and a device for the application of said method
    Patent number: 4351059
    Abstract: A method for testing a digital data transmission line connected between two modems, including the steps of transmitting a test message from the first modem to the second modem, comparing the received message with the standard test message to determine errors, transmitting a test message back to the first modem along with the error message determined from comparing the received test message with the standard test message at the first modem. The error signal transmitted to the first modem and the error detected there is interpreted to determine the error in the transmission.
    Type: Grant
    Filed: September 16, 1980
    Date of Patent: September 21, 1982
    Assignee: Lignes Telegraphiques et Telephoniques
    Inventors: Michel Gregoire, Jean C. Vuillemin