Patents by Inventor Naoki Minegishi

Naoki Minegishi 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).

  • Document data processing method and apparatus for document retrieval
    Patent number: 5469354
    Abstract: High-speed full document retrieval method and system capable of providing result of retrieval within practically acceptable short search time. Upon registration of documents in a document database, condensed texts are created by decomposing each of textual character strings of the documents to be registered into fragmental character strings in dependence on character species and by checking mutual inclusion relations existing among the fragmental character strings. A component character table is created in which characters occurring in each of the condensed texts are registered without duplication. The condensed texts and the component character table are registered in the data base together with the texts of the documents to be registered.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: November 21, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Hatakeyama, Hiromichi Fujisawa, Kanji Kato, Hisamitsu Kawaguchi, Naoki Minegishi, Katsumi Tada, Satoshi Asakawa