Patents by Inventor Louis-Claude Guillou

Louis-Claude Guillou 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 of electronic payment by chip card by means of numbered tokens allowing the detection of fraud
    Patent number: 5305383
    Abstract: Method of electronic payment by chip card.According to the invention, each token carries a number making it possible to check its authenticity.The invention is used for electronic payment.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: April 19, 1994
    Assignees: France Telecom, Telediffusion de France S.A., U.S. Philips Corporation
    Inventors: Louis-Claude Guillou, Jean-Jacques Quisquater