Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8139940 | Wavelength division multiplexing transmission system and remote apparatus and station apparatus used therein | — | 2012-03-20 |
| 7684703 | Wavelength division multiplexing transmission system and remote apparatus and station apparatus used therein | — | 2010-03-23 |
| 7609728 | Optical transmission switching device | Toshiaki Arikawa, Ryuuichi Ikematsu, Hajima Ishikawa, Takahide Sugita, Hidetoshi Shinoda | 2009-10-27 |
| 7580634 | Transmission method, transmitter-receiver, and transmitting-receiving system | Takeshi Takeuchi, Akio Tajima, Akihiro Tanaka, Wakako Maeda | 2009-08-25 |
| 7372804 | Multiplex communication system and method | Toshiaki Arikawa, Ryuuichi Ikematsu, Hajime Ishikawa, Takahide Sugita, Hidetoshi Shinoda | 2008-05-13 |
| 7295779 | Wavelength division-multiplexing optical transmission system | Akio Tajima | 2007-11-13 |
| 6574019 | Transmission system, and station unit and remote units to be used therein | — | 2003-06-03 |
| 5963558 | Data transmission system and a terminal management method of the same | — | 1999-10-05 |