Patents by Inventor Martha A. Branstad

Martha A. Branstad 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).

  • Data protection for computer systems
    Patent number: 4962533
    Abstract: A computer system uses security labels for evey word in memory. Each access to a memory location requires that the security level of the memory location be compared to that of a process which is making the access. If the security level of the process does not dominate that of the memory location, access is denied. Each time a memory location is modified, it is assigned a security level consistent with the levels of all of the data which was used to modify the memory location.
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: October 9, 1990
    Assignee: Texas Instrument Incorporated
    Inventors: Steven D. Krueger, Martha A. Branstad, Stephen T. Walker