Patents by Inventor Rolf D. Armstrong

Rolf D. Armstrong 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).

  • Circuit and a method for the selection of original data from a register log containing original and modified data
    Patent number: 4805095
    Abstract: A circuit for maintaining copies of original index registers and copies of modified index registers such that in the event original copies of the index registers are needed, they may be restored. The circuit is for use in a fault tolerant system wherein in the event of a rollback, original copies of the index registers may be restored to a processor, even if some of the index registers were modified in the previous execution of a command by the processor.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: February 14, 1989
    Assignee: NCR Corporation
    Inventors: Rolf D. Armstrong, Jon M. Corcoran, Victor F. Cole