Patents by Inventor Hisashi Fujishima

Hisashi Fujishima 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).

  • Method of preventing double data reception in selective reception communication system
    Patent number: 5734836
    Abstract: A selective reception communication system operates to prevent a double data reception from occurring owing to the difference between times at which data are transmitted over transmission paths when switching is effected from one transmission path to another due to a transmission path or node fault. Frame data transmission delay times required for data to reach a destination node over the transmission paths are established in every predetermined period of time. For data communication between nodes, frame data transmitted over the transmission path are given time delays corresponding to the differences between the established frame data transmission delay times and the longest one of the frame data transmission delay times. The frame data which have been transmitted over the different transmission paths now arrive simultaneously at the destination node where switching is made between the transmission paths.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: March 31, 1998
    Assignee: Fujitsu Limited
    Inventors: Hisashi Fujishima, Kazuhiro Iitsuka, Youichi Imaizumi