Patents by Inventor Curtis Ellmann

Curtis Ellmann 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).

  • Determining the satisfiability and transitive closure of conditions in a query
    Patent number: 6990484
    Abstract: A method and computer system for improving the efficiency of execution of a database query that includes conditions is disclosed. Satisfiability of the conditions is analyzed before executing the query. If the conditions are satisfiable, the transitive closure of the conditions is analyzed and the conditions are modified to meet transitive closure, if necessary, before executing the query.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: January 24, 2006
    Assignee: NCR Corporation
    Inventors: Ahmad Ghazal, Curtis Ellmann