Patents by Inventor Phillip D. Tonge

Phillip D. Tonge 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).

  • Secure memory having multiple security levels
    Patent number: 5991519
    Abstract: According to the present invention, a secured memory comprises a first level security zone having an access code controlling access to the secured memory prior to an issuer fuse being blown, a security code attempts counter preventing access to the secured memory when a predetermined number of attempts at matching the access code have been made prior to resetting the security code attempts counter, a plurality of application zones, each of the plurality of application zones comprising: a storage memory zone, an application security zone having an application zone access code controlling access to the storage memory zone after an issuer fuse has been blown, an application zone security code attempts counter preventing access to the application zone when a predetermined number of attempts at matching the application zone access code have been made prior to resetting the application zone security code attempts counter, an erase key partition having an erase key code controlling erase access to the storage memory
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: November 23, 1999
    Assignee: Atmel Corporation
    Inventors: Jean-Pierre Benhammou, Dennis F. Baran, Phillip D. Tonge, Edward L. Terry, Jr.