Patents by Inventor Tomoki Nakamigawa

Tomoki Nakamigawa 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).

  • Method for updating an index tree structure of data based on node sizes
    Patent number: 5307486
    Abstract: In a data processing system for processing data having an index tree structure, a buffer rate is set in advance. When a record is to be inserted or deleted, this buffer rate is used so that a data process to be performed can be selected from a simple insert process, an overflow process, node split process, a simple delete process, an underflow process, and a node concatenation process. With this operation, the data of the index tree structure can be efficiently processed.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: April 26, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tomoki Nakamigawa