Patents by Inventor Sansei Oshima

Sansei Oshima 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).

  • Data registration and retrieval method, data registration and retrieval program and database system
    Publication number: 20090037381
    Abstract: A database system registers data unreflected in an index into a registration text buffer. When the database system retrieves a registration text buffer, the database system prepares a registration buffer index using retrieval character indicated by a retrieval request. Thereafter, when a retrieval request is received, an index in a database is retrieved. When there is no pertinent data in the index, the registration buffer index is retrieved. An index indicated by the registration buffer index is used to retrieve the registration text buffer. The database system reflects the registration buffer index in the index at predetermined timing. Thus, even if the number of data registered in the registration text buffer is increased, the retrieval time is not increased.
    Type: Application
    Filed: March 7, 2008
    Publication date: February 5, 2009
    Applicant: Hitachi Ltd.
    Inventors: Sansei Oshima, Norihiro Hara, Takeo Maruyama, Masashi Tsuchida