Patents by Inventor Daniel Tsunfang Lee

Daniel Tsunfang Lee 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).

  • Run-time support for user-defined index ranges and index filters
    Patent number: 6285996
    Abstract: A method, apparatus, and article of manufacture for run-time support for user-defined index ranges and index filters. A statement is executed in a database stored on a data storage device, which is connected to a computer. The database contains data. A search range is generated based on a user-defined range function associated with a user-defined index.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: September 4, 2001
    Assignee: International Business Machines Corp.
    Inventors: Michelle Mei-Chiou Jou, Daniel Tsunfang Lee, Ping Li, Hsin Pan, Brian Thinh-Vinh Tran, Yun Wang
  • Supporting database indexes based on a generalized B-tree index
    Patent number: 6219662
    Abstract: A method, apparatus, and article of manufacture for computer-implemented support of database indexes based on a generalized B-tree index. The index is stored in a B-tree on a data storage device connected to a computer. In particular, multiple key sources are processed using key transformation. Then, a plurality of key targets are generated based on the processed key sources.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: April 17, 2001
    Assignee: International Business Machines Corporation
    Inventors: Gene Y. C. Fuh, Stefan Dessloch, Daniel Tsunfang Lee, Ping Li, Nelson Mendonca Mattos, Shahrokh Talmoud, Yun Wang