Patents by Inventor Johannes Ernst

Johannes Ernst 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).

  • Automatic subspace clustering of high dimensional data for data mining applications
    Patent number: 6003029
    Abstract: A method for finding clusters of units in high-dimensional data having the steps of determining dense units in selected subspaces within a data space of the high-dimensional data, determining each cluster of dense units that are connected to other dense units in the selected subspaces within the data space, determining maximal regions covering each cluster of connected dense units, determining a minimal cover for each cluster of connected dense units, and identifying the minimal cover for each cluster of connected dense units.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: December 14, 1999
    Assignee: International Business Machines Corporation
    Inventors: Rakesh Agrawal, Johannes Ernst Gehrke, Dimitrios Gunopulos, Prabhakar Raghavan
  • Densely sintered, tabular ceramic parts of aluminum oxide having improved thermal shock resistance
    Patent number: 5589430
    Abstract: The invention relates to a densely sintered tabular ceramic part of aluminum oxide having improved thermal shock resistance, which possesses a fine porosity of at most 10% by volume, does not contain inclusions having a diameter of .gtoreq.70 .mu.m within the ceramic microstructure and is not destroyed on immersion in a molten metal bath having a temperature of at least 350.degree. C. The invention also relates to a process for producing such a shaped part.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: December 31, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Krahn, Johannes Ernst, Claudia Drabent
  • Densely sintered, tabular ceramic parts of aluminum oxide having improved thermal shock resistance
    Patent number: 5518974
    Abstract: The invention relates to a densely sintered tabular ceramic part of aluminum oxide having improved thermal shock resistance, which possesses a fine porosity of at most 10% by volume, does not contain inclusions having a diameter of .gtoreq.70 .mu.m within the ceramic microstructure and is not destroyed on immersion in a molten metal bath having a temperature of at least 350.degree. C. The invention also relates to a process for producing such a shaped part.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: May 21, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Krahn, Johannes Ernst, Claudia Drabent