Patents by Inventor Koya Sakurai

Koya Sakurai 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).

  • Uninterrupted-service expansion system for a cross connecting device
    Patent number: 5859844
    Abstract: A switching unit of a cross connecting device is expanded with no momentary interruption, while data loss and data overlapping is eliminated. To achieve such an expansion, a cross connecting device comprises a base set having a switching unit for determining an output channel based on virtual path information for cell data that is input and for outputting the cell data. An expanded set has a switching unit for receiving the cell data from the base set and cell data from another base set, and for determining an output channel based on virtual path information for both inputs of cell data and for outputting the cell data. A filter prevents the transmission, to the expanded set, of cell data for which the output channel is determined by the switching unit of the base set.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: January 12, 1999
    Assignee: Fujitsu Limited
    Inventors: Keiichi Kanno, Ryuichi Kondo, Koya Sakurai, Toshifumi Fujimoto
  • Clocking converter for asynchronous data
    Patent number: 5684841
    Abstract: A clocking converter for asynchronous data capable of performing bit synchronization processes of asynchronous data of different patterns by the same circuit, requiring virtually no change made therein, and shortening the processing time while achieving downscaling of the circuit structure.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: November 4, 1997
    Assignee: Fujitsu Ltd.
    Inventors: Yoshinori Chiba, Motoya Kurotsu, Seiichiro Hirayama, Koya Sakurai