Patents by Inventor William H. Eitner

William H. Eitner 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).

  • Method and apparatus for upgrading software subsystems without interrupting service
    Patent number: 6070012
    Abstract: A method and system for updating a software subsystem while services are being provided by the software subsystem is provided. Initially, instructions are processed from a primary software subsystem loaded at a first base address associated with a primary storage unit. A secondary software subsystem is downloaded at a second base address associated with a secondary storage unit while the primary software subsystem is being executed. The secondary software subsystem typically contains an updated version of the primary software subsystem. To install the updated software subsystem, the first base address associated with the primary storage unit is swapped with the second base address associated with the secondary storage unit. Execution continues using the updated software subsystem without a significant interruption in service.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: May 30, 2000
    Assignee: Nortel Networks Corporation
    Inventors: William H. Eitner, Suresh D. Mahanty