Patents by Inventor Robert C. B. Cooper

Robert C. B. Cooper 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).

  • Transparent fault tolerant computer system
    Patent number: 5968185
    Abstract: In a fault-tolerant computer system, a primary replica supervisor is interposed between an operating system and a primary replica of an application program being executed by a primary processor. An object-code editor locates calls to the operating system and loops in the application program and inserts instruction sequences that enable the replica supervisor to intercept the calls to the operating system, results returned by the operating system as a result of the calls and asynchronous events delivered by the operating system to the replica. A backup replica supervisor is similarly interposed between an operating system and a backup replica of the application program being executed by a backup processor. The primary replica interacts with an environment.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: October 19, 1999
    Assignee: Stratus Computer, Inc.
    Inventors: Thomas C. Bressoud, John E. Ahern, Kenneth P. Birman, Robert C. B. Cooper, Bradford B. Glade, Fred B. Schneider, John D. Service
  • Transparent fault tolerant computer system
    Patent number: 5802265
    Abstract: In a fault-tolerant computer system, a primary replica supervisor is interposed between an operating system and a primary replica of an application program being executed by a primary processor. An object-code editor locates calls to the operating system and loops in the application program and inserts instruction sequences that enable the replica supervisor to intercept the calls to the operating system, results returned by the operating system as a result of the calls and asynchronous events delivered by the operating system to the replica. A backup replica supervisor is similarly interposed between an operating system and a backup replica of the application program being executed by a backup processor. The primary replica interacts with an environment.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: September 1, 1998
    Assignee: Stratus Computer, Inc.
    Inventors: Thomas C. Bressoud, John E. Ahern, Kenneth P. Birman, Robert C. B. Cooper, Bradford B. Glade, Fred B. Schneider, John D. Service