Patents by Inventor Akeimi Hirotsune

Akeimi Hirotsune 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).

  • Optical recording medium having inaccessible restricted block(s), and systems incorporating same
    Patent number: 7102988
    Abstract: In a medium having a restriction on its function which has an extremely low overwrite cyclability as compared with a common one, information is arranged so as to allow restricted write and read operations in a commonly current write and read drive, i.e., the medium is subjected to specific formatting. It is possible to perform write and read operations with security. The specific format can be performed with parameters taking the special-purpose using conditions (i.e., overwrite cyclability) into consideration. Consequently, it becomes possible to provide a low-priced information recording medium.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: September 5, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Akeimi Hirotsune, Harukazu Miyamoto, Yoshiko Nishi
  • Optical recording medium having unreadable restricted block(s), and systems incorporating same
    Patent number: 7102987
    Abstract: In a medium having a restriction on its function which has an extremely low overwrite cyclability as compared with a common one, information is arranged so as to allow restricted write and read operations in a commonly current write and read drive, i.e., the medium is subjected to specific formatting. It is possible to perform write and read operations with security. The specific format can be performed with parameters taking the special-purpose using conditions (i.e., overwrite cyclability) into consideration. Consequently, it becomes possible to provide a low-priced information recording medium.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: September 5, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Akeimi Hirotsune, Harukazu Miyamoto, Yoshiko Nishi
  • Optical recording medium having inaccessible restricted block(s), and systems incorporating same
    Publication number: 20040193949
    Abstract: In a medium having a restriction on its function which has an extremely low overwrite cyclability as compared with a common one, information is arranged so as to allow restricted write and read operations in a commonly current write and read drive, i.e., the medium is subjected to specific formatting. It is possible to perform write and read operations with security. The specific format can be performed with parameters taking the special-purpose using conditions (i.e., overwrite cyclability) into consideration. Consequently, it becomes possible to provide a low-priced information recording medium.
    Type: Application
    Filed: February 23, 2004
    Publication date: September 30, 2004
    Inventors: Akeimi Hirotsune, Harukazu Miyamoto, Yoshiko Nishi
  • Optical recording medium having unrecordable restricted block(s), and systems incorporating same
    Patent number: 6788642
    Abstract: In a medium having a restriction on its function, which has a extremely low overwrite cyclability as compared with a common one, information is arranged so as to allow restricted write and read operations in a commonly used current write and read drive, i.e., the medium is subjected to specific formatting. It is possible to perform write and read operations with security. The specific format can be performed with parameters taking into consideration special-purpose use conditions (i.e., overwrite cyclability). Consequently, it becomes possible to provide a low-priced information recording medium.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: September 7, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Akeimi Hirotsune, Harukazu Miyamoto, Yoshiko Nishi
  • Optical recording medium having unreadable restricted block(s), and systems incorporating same
    Publication number: 20040163010
    Abstract: In a medium having a restriction on its function which has an extremely low overwrite cyclability as compared with a common one, information is arranged so as to allow restricted write and read operations in a commonly current write and read drive, i.e., the medium is subjected to specific formatting. It is possible to perform write and read operations with security. The specific format can be performed with parameters taking the special-purpose using conditions (i.e., overwrite cyclability) into consideration. Consequently, it becomes possible to provide a low-priced information recording medium.
    Type: Application
    Filed: February 23, 2004
    Publication date: August 19, 2004
    Inventors: Akeimi Hirotsune, Harukazu Miyamoto, Yoshiko Nishi
  • Information recording medium
    Publication number: 20020145966
    Abstract: In a medium having a restriction on its function which has a extremely low overwrite cyclability as compared with a common one, information is arranged so as to allow restricted write and read operations in a commonly current write and read drive, i.e., the medium is subjected to specific formatting. It is possible to perform write and read operations with security. The specific format can be performed with parameters taking the special-purpose using conditions (i.e., overwrite cyclability) into consideration. Consequently, it becomes possible to provide a low-priced information recording medium.
    Type: Application
    Filed: August 15, 2001
    Publication date: October 10, 2002
    Inventors: Akeimi Hirotsune, Harukazu Miyamoto, Yoshiko Nishi