Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9461841 | Communication system, communication method, node, and program for node | Daisaku Ogasahara | 2016-10-04 |
| 9154254 | Wavelength path multiplexing/demultiplexing apparatus and wavelength path multiplexing/demultiplexing method | Shigeru Nakamura, Tomoyuki Hino | 2015-10-06 |
| 9083142 | Excitation light distribution device, excitation light distribution method, optical amplification system and node device | — | 2015-07-14 |
| 8929734 | Multiplexer/demultiplexer and multiplexing/demultiplexing method | Kenji Mizutani, Akio Tajima, Tomoyuki Hino, Masahiro Hayashitani, Hiroyuki Takagi | 2015-01-06 |
| 8917994 | Wavelength path multiplexing and demultiplexing optical transmission apparatus | Shigeru Nakamura | 2014-12-23 |
| 8811817 | Optical signal transmission device, optical signal reception device, wavelength division multiplexing optical communication device, and wavelength path system | Shigeru Nakamura | 2014-08-19 |
| 8724518 | Communication system, node, terminal, program and communication method | Daisaku Ogasahara | 2014-05-13 |
| 8693880 | Wavelength path communication node apparatus, wavelength path communication control method, and recording medium | Shigeru Nakamura, Yutaka Urino, Itaru Nishioka, Kiyoshi Fukuchi | 2014-04-08 |
| 8401008 | Network node, frame transfer program and frame transfer method | Daisku Ogasahara | 2013-03-19 |
| 8072878 | Packet ring network system, packet transfer system, redundancy node, and packet transfer program | Daisaku Ogasahara | 2011-12-06 |
| 7920576 | Packet ring network system, packet forwarding method and node | Daisaku Ogasahara | 2011-04-05 |
| 7898942 | Ring network system, failure recovery method, failure detection method, node and program for node | Kazuo Takagi, Daisaku Ogasahara | 2011-03-01 |
| 7848340 | System and method for transmission of data in packet ring network system | Daisaku Ogasahara, Kazuo Takagi | 2010-12-07 |
| 7826400 | Packet ring network system and packet transport method | — | 2010-11-02 |