Patents by Inventor Rodolphe Uhlmann

Rodolphe Uhlmann 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).

  • Device for protecting memory areas of an electronic microprocessor
    Patent number: 5559989
    Abstract: A decision circuit receives input addresses of instructions to be executed and data addresses to which the instructions have to be applied. The decision circuit either allows the execution of the instruction or prohibits the execution of the instruction if the instruction leads to a false operation or to a fraudulent attempt to divulge the system contents. A buffer register stores the instruction addresses and subsequently presents them to the decision circuit simultaneously with the data addresses. This device applies particularly to the protection of electronic integrated circuit memory cards.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: September 24, 1996
    Assignee: SGS-Thomson Microelectronics, S.A.
    Inventors: Laurent Sourgen, Rodolphe Uhlmann
  • Device for enabling the use of the contents of memory areas of an electronic microprocessor system
    Patent number: 5361341
    Abstract: A decision circuit receives input addresses of instructions to be executed and data addresses to which the instructions are to be applied. The decision circuit either allows the execution of the instruction or prohibits the execution of the instruction if the instruction leads to a false operation or to a fraudulent attempt to divulge the system contents. A buffer register stores the instruction addresses and subsequently presents them to the decision circuit simultaneously with the data addresses. This device applies particularly to the protection of electronic integrated circuit memory cards.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: November 1, 1994
    Assignee: SGS-Thomson Microelectronics, S.A.
    Inventors: Laurent Sourgen, Rodolphe Uhlmann