Patents by Inventor Masahide Washizawa

Masahide Washizawa 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 system implementing write once read many (WORM)
    Patent number: 9659028
    Abstract: The embodiments deal with files that are already present in a storage when mounting the storage in a file system and files created after the mounting as different groups. (Metadata of) the files is classified. The files are each divided into metadata (index) and a file main body and are recorded on different storage areas, that is, an index partition (IP) and a data partition (DP), associated with each other. This file system is effective in a storage format in which a new file is merely written and an already written file is not updated or deleted (for example, a tape medium used in the LTFS). The embodiments implement a WORM file system by rejecting a request to update or delete a file that is present at mounting as a WORM file and permitting update or deletion of a file that is created after mounting until the storage is unmounted.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: May 23, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Atsushi Abe, Takashi Ashida, Takeshi Ishimoto, Setsuko Masuda, Yutaka Oishi, Masahide Washizawa, Terue Watanabe
  • File system implementing write once read many (WORM)
    Patent number: 9659029
    Abstract: The embodiments deal with files that are already present in a storage when mounting the storage in a file system and files created after the mounting as different groups. (Metadata of) the files is classified. The files are each divided into metadata (index) and a file main body and are recorded on different storage areas, that is, an index partition (IP) and a data partition (DP), associated with each other. This file system is effective in a storage format in which a new file is merely written and an already written file is not updated or deleted (for example, a tape medium used in the LTFS). The embodiments implement a WORM file system by rejecting a request to update or delete a file that is present at mounting as a WORM file and permitting update or deletion of a file that is created after mounting until the storage is unmounted.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: May 23, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Atsushi Abe, Takashi Ashida, Takeshi Ishimoto, Setsuko Masuda, Yutaka Oishi, Masahide Washizawa, Terue Watanabe
  • FILE SYSTEM IMPLEMENTING WRITE ONCE READ MANY (WORM)
    Publication number: 20150120740
    Abstract: The embodiments deal with files that are already present in a storage when mounting the storage in a file system and files created after the mounting as different groups. (Metadata of) the files is classified. The files are each divided into metadata (index) and a file main body and are recorded on different storage areas, that is, an index partition (IP) and a data partition (DP), associated with each other. This file system is effective in a storage format in which a new file is merely written and an already written file is not updated or deleted (for example, a tape medium used in the LTFS). The embodiments implement a WORM file system by rejecting a request to update or delete a file that is present at mounting as a WORM file and permitting update or deletion of a file that is created after mounting until the storage is unmounted.
    Type: Application
    Filed: September 19, 2014
    Publication date: April 30, 2015
    Applicant: International Business Machines Corporation
    Inventors: ATSUSHI ABE, Takashi Ashida, Takeshi Ishimoto, Setsuko Masuda, Yutaka Oishi, Masahide Washizawa, Terue Watanabe
  • FILE SYSTEM IMPLEMENTING WRITE ONCE READ MANY (WORM)
    Publication number: 20150120741
    Abstract: The embodiments deal with files that are already present in a storage when mounting the storage in a file system and files created after the mounting as different groups. (Metadata of) the files is classified. The files are each divided into metadata (index) and a file main body and are recorded on different storage areas, that is, an index partition (IP) and a data partition (DP), associated with each other. This file system is effective in a storage format in which a new file is merely written and an already written file is not updated or deleted (for example, a tape medium used in the LTFS). The embodiments implement a WORM file system by rejecting a request to update or delete a file that is present at mounting as a WORM file and permitting update or deletion of a file that is created after mounting until the storage is unmounted.
    Type: Application
    Filed: October 17, 2014
    Publication date: April 30, 2015
    Applicant: International Business Machines Corporation
    Inventors: ATSUSHI ABE, Takashi Ashida, Takeshi Ishimoto, Setsuko Masuda, Yutaka Oishi, Masahide Washizawa, Terue Watanabe
  • Technique for improving accuracy of machine translation
    Patent number: 8126698
    Abstract: A system for translating messages is provided.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: February 28, 2012
    Assignee: International Business Machines Corporation
    Inventors: Masahide Washizawa, Tomohiro Miyahira
  • TECHNIQUE FOR IMPROVING ACCURACY OF MACHINE TRANSLATION
    Publication number: 20080103757
    Abstract: A system for translating messages is provided.
    Type: Application
    Filed: October 24, 2007
    Publication date: May 1, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Masahide Washizawa, Tomohiro Miyahira