Patents by Inventor Stephen A. Hogge

Stephen A. Hogge 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).

  • Methods and apparatus for maintaining a programmable logic control revision history
    Patent number: 6701284
    Abstract: Methods and apparatus for maintaining a PLC revision history are described. In one embodiment, the PLC creates and maintains a revision history log that provides information related to changes made to the PLC user program and/or the PLC configuration. If a change is detected, information regarding the change is gathered and stored in the history log. The history log maintains a record of the revisions made to the PLC. If the history log becomes full, the oldest revision entry is deleted and the latest change is incorporated into the history log.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: March 2, 2004
    Assignee: GE Fanuc Automation North America, Inc.
    Inventors: William M. Huntley, Stephen A. Hogge