Patents by Inventor Olivier F. Cahart

Olivier F. Cahart 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).

  • Authentication system between a card reader and a pay card exchanging data
    Patent number: 4612413
    Abstract: A reciprocal authentication system between two groups of electronic units which can be interconnected for the exchange of data.The system periodically supplies a variable access key for the encrypting of confidential exchanges.
    Type: Grant
    Filed: July 18, 1984
    Date of Patent: September 16, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Serge Robert, Olivier F. Cahart, Pierre Le Marchant