Patents by Inventor Pierre Le Marchant

Pierre Le Marchant 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
  • Portable, identifying element constructed as a lamination of sheets
    Patent number: 4380699
    Abstract: A portable identifying element has the general shape of a laminated credit card, and comprises a front sheet (6), a central sheet (1) and a rear sheet (6'), all of plastic material. An active electronic circuit (3) is positioned within a cavity (2) of the central sheet. A thin layer of copper (7) is juxtaposed with the electronic circuit between the front sheet and rear sheet for removing heat dissipated within the circuit.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: April 19, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Michel J. Monnier, Marc A. Monneraye, Claude Foucher, Pierre Le Marchant