Patents by Inventor Michael Heytens

Michael Heytens 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).

  • Systems and methods for estimating the number of unique attributes in a database
    Patent number: 7428550
    Abstract: Systems and methods for estimating the number of unique attributes in a database are disclosed that can include generating a first estimate of the unique values of an attribute using a data sample; generating a second estimate of the unique values of the attribute in the data sample; forming a weighted first estimate; forming a weighted second estimate; and combining the weighted first and second estimates to form a final estimate.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: September 23, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Choudur Lakshminarayan, Michael Heytens
  • Systems and methods for estimating the number of unique attributes in a database
    Publication number: 20060047683
    Abstract: Systems and methods for estimating the number of unique attributes in a database are disclosed that can include generating a first estimate of the unique values of an attribute using a data sample; generating a second estimate of the unique values of the attribute in the data sample; forming a weighted first estimate; forming a weighted second estimate; and combining the weighted first and second estimates to form a final estimate.
    Type: Application
    Filed: August 27, 2004
    Publication date: March 2, 2006
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Choudur Lakshminarayan, Michael Heytens
  • Method and apparatus for record addressing in partitioned files
    Patent number: 6557014
    Abstract: A method and apparatus introduces the creation and use of two record addressing functions. One function “computeRID” assigns identifiers to records, and the other function “lookupRID” performs the related task of locating a record given its identifier.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: April 29, 2003
    Assignee: Compaq Computer Corporation
    Inventors: Pedro Cellis, Michael Heytens, Mark Melton
  • Method and apparatus for record addressing in partitioned files
    Patent number: 6473774
    Abstract: A method and apparatus introduces the creation and use of two record addressing functions. One function “computeRID” assigns identifiers to records, and the other function “lookupRID” performs the related task of locating a record given its identifier.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: October 29, 2002
    Assignee: Compaq Computer Corporation
    Inventors: Pedro Cellis, Michael Heytens, Mark Melton