Patents by Inventor Norman Sievert Shelvik

Norman Sievert Shelvik 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).

  • Safety controller providing rapid recovery of safety program data
    Patent number: 7027880
    Abstract: Re-certification of a control program loaded in a safety controller is avoided through the use of a digital snapshot and digital signature, the snapshot providing a rapidly loadable memory image file and the signature providing a confirmation that the file loaded matches a previously certified copy so as to avoid the need for time consuming re-certification.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: April 11, 2006
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Joseph Paul Izzo, Norman Sievert Shelvik, Michael Dean Kalan, Charles Martin Rischar, Raymond Louis Buvel