Patents by Inventor Sumiyo Taoka

Sumiyo Taoka 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 managing system for managing files shared with a plurality of users
    Patent number: 5724578
    Abstract: A file managing system manages a plurality of files shared with a plurality of users. The files are linked to each other, and are controlled in accordance with link information. File control information is defined to represent a status of rights given to each of the users who is permitted to perform a processing which corresponds to one of the rights the status of which is in an on-state. The file control information is produced for each of the files. Link control information including link information representing a condition of the link between the first file and the second file is defined. The link control information further includes information which represents whether each of the users is permitted to use the link. The link control information is produced for each of the files. The access of each of said users to the files and the access of each of users to the link is controlled in accordance with the file control information and the link control information.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: March 3, 1998
    Assignee: Fujitsu Limited
    Inventors: Masanobu Morinaga, Masahiko Murakami, Tadashige Iwao, Satoshi Okuyama, Noriyuki Fukuyama, Masahiro Matsuda, Sumiyo Taoka