Patents by Inventor Takumi Iwatsuki

Takumi Iwatsuki 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).

  • Network operation monitoring system
    Publication number: 20040019676
    Abstract: A network operation monitoring system comprising a memory unit for storing network status information in a time series with respect to each operation performed by an operator on a network or with respect to each transition in events, a retrieval unit for retrieving the network status information stored in the memory unit in a time-dependant manner according to the operator's instruction, and a display unit for displaying the network status information retrieved by the retrieval unit in the time-dependant manner according to the operator's instruction.
    Type: Application
    Filed: December 3, 2002
    Publication date: January 29, 2004
    Applicant: FUJITSU LIMITED
    Inventors: Takumi Iwatsuki, Masaki Mishima, Atsushi Hattori, Kei Higuchi, Mitsuhiko Watanabe
  • Spanning tree control unit in the case of trouble or increase and method thereof
    Publication number: 20020159398
    Abstract: The present invention relates to a method and device for connecting segments of a LAN with each other. Especially, the present invention provides a method and device in which the reconstruction of a network is unnecessary and the operation of the network can be maintained in the case of increase the number of apparatus or trouble of the device in which the spanning tree protocol is used.
    Type: Application
    Filed: October 5, 2001
    Publication date: October 31, 2002
    Inventors: Masataka Yamada, Yuji Kuwabara, Takumi Iwatsuki, Takashi Mochizuki, Makoto Watanabe, Hiroomi Shinha, Toshihiro Ikeda