Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7450844 | WDM optical transmission equipment with redundant configuration, and wavelength control method of light output in standby system | Kenji Ohta | 2008-11-11 |
| 6266466 | Optical amplifier and optical transmission system | Kazuyuki Tanikawa, Mitsuo Kitamura | 2001-07-24 |
| 5859938 | Optical amplifier and optical transmission system | Kazuyuki Tanikawa, Mitsuo Kitamura | 1999-01-12 |
| 5570227 | Method and apparatus for preventing occurrence of surge light in optical amplifier/transmitter apparatus | Hirofumi Araki | 1996-10-29 |