Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9184864 | Optical transmission system, optical transmitting apparatus, and optical receiving apparatus | — | 2015-11-10 |
| 9037002 | Pre-emphasis control method and optical transmission system | Jyunji Tanaka, Shinichi Kaneko | 2015-05-19 |
| 7146100 | Repeater and Raman amplification repeating system | — | 2006-12-05 |
| 6816683 | Wavelength division multiplexing communications network supervisory system | Takafumi Terahara, Shin-ichirou Harasawa | 2004-11-09 |
| 6452701 | Wavelength division multiplexing communications network supervisory system | Takafumi Terahara, Shin-ichirou Harasawa | 2002-09-17 |
| 6301032 | Optical multiplexing/demultiplexing device | Shin-ichirou Harasawa | 2001-10-09 |
| 5768011 | Optical amplifying repeater | Kazuya Amaki | 1998-06-16 |