Patents by Inventor Yuuji Kamura

Yuuji Kamura 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).

  • Packet transmission system and a terminal apparatus
    Patent number: 7327745
    Abstract: A packet transmission system is disclosed. The system serves between terminal apparatuses that include a supervisory control circuit configured to transmit a supervisory signal in a direction opposite to the transmission direction of a main signal on each of and both of an upstream circuit and a downstream circuit. The packet transmission system transmits overhead information of a packet frame of the main signal of the upstream circuit and the downstream circuit using the supervisory control circuit of the downstream circuit and the upstream circuit, respectively.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: February 5, 2008
    Assignee: Fujitsu Limited
    Inventors: Osamu Takeuchi, Yuuji Kamura, Hideaki Arao, Hirotaka Morita, Hiroyuki Ohgaki
  • Packet transmission system and a terminal apparatus
    Publication number: 20050152349
    Abstract: A packet transmission system is disclosed. The system serves between terminal apparatuses that include a supervisory control circuit configured to transmit a supervisory signal in a direction opposite to the transmission direction of a main signal on each of and both of an upstream circuit and a downstream circuit. The packet transmission system transmits overhead information of a packet frame of the main signal of the upstream circuit and the downstream circuit using the supervisory control circuit of the downstream circuit and the upstream circuit, respectively.
    Type: Application
    Filed: January 18, 2005
    Publication date: July 14, 2005
    Inventors: Osamu Takeuchi, Yuuji Kamura, Hideaki Arao, Hirotaka Morita, Hiroyuki Ohgaki