Patents by Inventor Keith G. Bunker

Keith G. Bunker 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).

  • Control system job recovery after a malfunction
    Patent number: 4521847
    Abstract: The present invention is a multiprocessor control system that allows full job recovery after a machine power down or after a malfunction or software crash or temporary power outage. In particular, essential variables such as the state and status of the machine and the programmed job at the time of the malfunction are maintained in nonvolatile memory. This information is continually updated in nonvolatile memory. Once the control system has reset and reinitialized all the control elements after a malfunction, the control restores or downloads all the relevant variables in the nonvolatile memory to the various control elements to maintain status. In another embodiment, the essential variables are maintained in RAM locations in a master processor and saved for downloading to the control elements.
    Type: Grant
    Filed: September 21, 1982
    Date of Patent: June 4, 1985
    Assignee: Xerox Corporation
    Inventors: Richard T. Ziehm, Stephen P. Wilczek, George E. Baker, Raymond R. Husted, Glen A. Dumas, Keith G. Bunker, George H. Place, Jr.