Patents by Inventor Mark A. Howell

Mark A. Howell 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).

  • Transaction control
    Patent number: 5390302
    Abstract: A transaction management protocol for a multi-processor computer system in which the processors are organized in multi-level hierarchy for implementing the transaction, the protocol being a modification and elaboration of the Presumed Abort (PA) protocol. A coordinating processor is permitted to forget the participation of a subordinate as soon as the protocol has reached the point at which the subordinate's actions on recovery from a crash would be independent of the outcome (commit or abort) of the protocol.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: February 14, 1995
    Assignee: Digital Equipment Corporation
    Inventors: James E. Johnson, Mark A. Howell, Christopher Whitaker