Patents by Inventor Eugene E. Lindstrom

Eugene E. Lindstrom 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).

  • External sorting using key value distribution and range formation
    Patent number: 4575798
    Abstract: A method for executing an external distribution sort in which the data to be rearranged includes keyed stored records that can be accessed on associative secondary storage. The method steps include random sampling of a certain number of keys and internally sorting the sampled keys; forming equal sized partitions of records in a single pass, each partition of which can fit within internal CPU memory and constitute a range of key values; and associatively retrieving all of the records whose keys lie within a range and internally sorting said records.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: March 11, 1986
    Assignee: International Business Machines Corporation
    Inventors: Eugene E. Lindstrom, Jeffrey S. Vitter