Patents by Inventor Larry R. Ketcham

Larry R. Ketcham 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).

  • Software security system for maintaining integrity of compiled object code by restricting users ability to define compilers
    Patent number: 5111390
    Abstract: A computer system which uses a main processor with main memory, and operates under a specialized software operating system, provides for checking the integrity of its compiler by use of software routines which permit an authorized user or an authorized program to authorize a file as a compiler and additionally will operate to identify any ordinary user and ordinary programs so as to prevent such ordinary user or ordinary program from authorizing a code file as a compiler.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: May 5, 1992
    Assignee: Unisys Corporation
    Inventor: Larry R. Ketcham