Patents by Inventor Hitoshi Takamoro

Hitoshi Takamoro 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).

  • File block managing system using next record header position data and delete history data from block header and record headers to locate requested record block
    Patent number: 5170479
    Abstract: According to the present invention, a header includes delete history data (counter) area where a delete history of the logically subsequent record header is written in. By sequentially referring to record headers by using this data, a logical storing order of records is not destroyed even if a delete instruction is executed. In addition, the header has physical position data. Accordingly, when a squeeze instruction is executed after the delete instruction, the logical storing order of records is not destroyed and an empty area in the block can be effectively utilized.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: December 8, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hitoshi Takamoro