Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7092149 | Input monitoring system for optical amplifying repeater | Shinichirou Harasawa, Hiroyuki Deguchi | 2006-08-15 |
| 6480658 | Optical fiber transmission line for wavelength division multiplexing transmission system | Takao Naito, Jose Chesnoy, Olivier Gautheron | 2002-11-12 |
| 6204945 | Signal light outputting apparatus and optical transmission system having signal light outputting apparatus | Hiroyuki Iwata | 2001-03-20 |
| 5838476 | Input monitoring system for optical amplifying repeater | Shinichirou Harasawa, Hiroyuki Deguchi | 1998-11-17 |
| 5729372 | Optical transmission method and apparatus and optical amplification method and apparatus for optical communication system | Takafumi Terahara, Terumi Chikama, Takao Naito | 1998-03-17 |
| 5546213 | Optical amplifier and optical communication system provided with the optical amplifier | — | 1996-08-13 |
| 5539566 | Optical transmission method and apparatus and optical amplification method and apparatus for optical communication system | Takafumi Terahara, Terumi Chikama, Takao Naito | 1996-07-23 |
| 5535050 | Optical amplifier and optical communication system with optical amplifier using pumping light beam | — | 1996-07-09 |
| 5526163 | Optical amplifier and optical communication system with optical amplifier using pumping light beam | — | 1996-06-11 |
| 5521737 | Optical amplifier and optical communication system with optical amplifier using pumping light beam | — | 1996-05-28 |
| 5510931 | Optical amplifier and optical communication system with optical amplifier using pumping right beam | — | 1996-04-23 |
| 5299048 | Optical amplifier and optical communication system provided with the optical amplifier | — | 1994-03-29 |