Patents by Inventor Takamitsu Saito

Takamitsu Saito 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).

  • Patent number: 6192485
    Abstract: In a redundant apparatus formed of an active unit and a stand-by unit, an upper unit is connected to the active unit though the connection controller in the normal operation, and controls the connection controller to switch the active unit over to the stand-by unit when a fault has occurred in the active unit. The connection controller includes a diagnosis portion which diagnoses the stand-by unit or the active unit with a test signal and notifies the result to the upper unit.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: February 20, 2001
    Assignee: Fujitsu Limited
    Inventors: Masatoshi Takita, Kazuei Ohnishi, Takamitsu Saito