Patents by Inventor Ryuji Wakabayashi

Ryuji Wakabayashi 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).

  • Backup system, backup method, database apparatus, and backup apparatus
    Patent number: 6850958
    Abstract: A backup system, a backup method, a database apparatus and a backup apparatus whereby loss of data is minimized in case of damage to the system. In the database apparatus, update information generating means generates, with respect to individual databases, update information indicating updates of the databases. Interrelation information generating means generates interrelation information indicating an interrelation between the update information for a certain database and the update information for other databases. Transmitting means transmits the update information and the interrelation information. In the backup apparatus, receiving means receives the update information and the interrelation information transmitted thereto, and backup databases hold backups of the contents of the databases. Interrelation determining means looks up the interrelation information received by the receiving means to determine the interrelation of each update information.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: February 1, 2005
    Assignee: Fujitsu Limited
    Inventor: Ryuji Wakabayashi
  • Backup system, backup method, database apparatus, and backup apparatus
    Publication number: 20020178174
    Abstract: A backup system, a backup method, a database apparatus and a backup apparatus whereby loss of data is minimized in case of damage to the system. In the database apparatus, update information generating means generates, with respect to individual databases, update information indicating updates of the databases. Interrelation information generating means generates interrelation information indicating an interrelation between the update information for a certain database and the update information for other databases. Transmitting means transmits the update information and the interrelation information. In the backup apparatus, receiving means receives the update information and the interrelation information transmitted thereto, and backup databases hold backups of the contents of the databases. Interrelation determining means looks up the interrelation information received by the receiving means to determine the interrelation of each update information.
    Type: Application
    Filed: November 16, 2001
    Publication date: November 28, 2002
    Applicant: FUJITSU LIMITED
    Inventor: Ryuji Wakabayashi