Patents by Inventor Tetuhiro Okabe

Tetuhiro Okabe 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).

  • Trouble diagnosis system of UPC circuit
    Patent number: 5465348
    Abstract: A UPC circuit fault diagnosis system for diagnosing a failure in a UPC circuit controls cell traffic volume on the basis of prescribed information about cell traffic. Failure diagnosis of a UPC circuit is provided by a usage parameter determination of at least one kind of cell, using more than one system and comparing determination results. The diagnosis system has an operating UPC circuit for controlling a total of m kinds of cells, and a standby UPC circuit for controlling a total of n kinds of cells. The system also has a total of q bridge memories for keeping a chronological record of the prescribed information of arriving cells. A fault diagnosis of the bridge memories is provided by comparing the contents of the bridge memories, using more than one system.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: November 7, 1995
    Assignee: Fujitsu Limited
    Inventors: Shigeo Amemiya, Takao Ogura, Takafumi Chujo, Hiroshi Takeo, Michio Kusayanagi, Naoaki Yamanaka, Yoichi Sato, Akihiko Takase, Shigeo Shinada, Mituhiro Takano, Kiyoshi Saitou, Kazuhiko Hohara, Tetuhiro Okabe