Patents by Inventor Jean Giachetti

Jean Giachetti 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).

  • Pseudo-random generator
    Patent number: 5218559
    Abstract: The generator of the invention includes an initialization circuit (CI) delivering four initialization words (QI, RI, SI, TI), one calculation circuit (CC) composed of four sub-units (SQ, SR, SS, ST) corresponding to four generating polynomials of orders 5, 5, 7 and 7, and finally one output logic circuit (CS) delivering a pseudo-random byte sequence.Application for systems with access control, especially television systems.
    Type: Grant
    Filed: January 8, 1992
    Date of Patent: June 8, 1993
    Assignees: France Telecom Etablissement Autonome de Droit Public (Centre National d'Etudes des Telecommunications), Etablissement Publics Telediffusion de France
    Inventors: Didier Angebaud, Jean Giachetti, Vincent Lenoir