Patents by Inventor Yukiko Fujiki

Yukiko Fujiki 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).

  • Database system capable of carrying out an efficient free area search
    Patent number: 5737603
    Abstract: In a database system of the present invention, a storage range in the data storage area has a control record storing the address of the additional range in the overflow area and the upper additional ranges constituting the additional range have control records storing the addresses of the connected lower additional range or ranges and of another upper additional range connected and the free area data for the connected lower additional ranges. In searching for a free area, storage range free area checking means judges whether the storage range has any free area, and upper additional range free area checking means judges whether the upper additional range has any free area. For existence of free area in lower additional ranges, lower additional range free area checking means refers to the free area data for the lower additional ranges stored in the control record of the upper additional range and judges whether a free area exists or not.
    Type: Grant
    Filed: September 11, 1995
    Date of Patent: April 7, 1998
    Assignee: NEC Corporation
    Inventor: Yukiko Fujiki