Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7031618 | Optical transmission system in which gains in gain bands are remotely controlled by transmitting tone signals having variable characteristics | — | 2006-04-18 |
| 6980745 | Optical transmission system | Hiroyuki Deguchi, Izumi Yokota | 2005-12-27 |
| 6907157 | Method and system for optical fiber transmission using raman amplification | — | 2005-06-14 |
| 6847788 | System and method for equalizing transmission characteristics in wavelength division multiplexing optical communication system | Isao Nakajima | 2005-01-25 |
| 6816683 | Wavelength division multiplexing communications network supervisory system | Takafumi Terahara, Takeo Osaka | 2004-11-09 |
| 6807370 | Optical transmission system | — | 2004-10-19 |
| 6452721 | Method, device, and system for evaluating characteristics of optical fiber transmission line | Hiroyuki Deguchi | 2002-09-17 |
| 6452701 | Wavelength division multiplexing communications network supervisory system | Takafumi Terahara, Takeo Osaka | 2002-09-17 |
| 6404523 | Wavelength division multiplexing system and its termination | Hajime Morikawa | 2002-06-11 |
| 6301032 | Optical multiplexing/demultiplexing device | Takeo Osaka | 2001-10-09 |
| 6185022 | Optical transmission system and transmitting terminal station | — | 2001-02-06 |
| 6075633 | Light transmission system | Hiroyuki Deguchi | 2000-06-13 |