Patents by Inventor Yoji Oka

Yoji Oka 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).

  • Path changing system and method for use in ATM communication apparatus
    Patent number: 5926456
    Abstract: An ATM path changing system and method for use in an ATM communication apparatus and ATM communication network are provided which can set an alternating route in the event of a failure occurring in a transmission line or VP. A header converter in a line controller includes a plurality of output path routing tables, a selector, a comparator, a register for failure RTG and a register for failure VPI and when the contents of the register for failure RTG or VPI coincides with a RTG or VPI of the output path routing tables, an output is selected in accordance with the contents of a selected emergency-route RTG or VPI register.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: July 20, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Masataka Takano, Yoji Oka, Akihiko Takase, Setsuo Takahashi
  • Path changing system and method for use in ATM communication apparatus
    Patent number: 5600630
    Abstract: An ATM path changing system and method for use in an ATM communication apparatus and ATM communication network are provided which can set an alternating route in the event of a failure occurring in a transmission line or VP. A header converter in a line controller includes a plurality of output path routing tables, a selector, a comparator, a register for failure RTG and a register for failure VPI and when the contents of the register for failure RTG or VPI coincides with a RTG or VPI of the output path routing tables, an output is selected in accordance with the contents of a selected emergency-route RTG or VPI register.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: February 4, 1997
    Assignees: Hitachi, Ltd., Hitachi Communication Systems, Inc.
    Inventors: Masataka Takano, Yoji Oka, Akihiko Takase, Setsuo Takahashi