Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6577440 | Optical fiber for optical amplifier and fiber optic amplifier | Shinji Endo, Shinji Ishikawa | 2003-06-10 |
| 6549315 | Optical transmission system and optical amplifying apparatus, optical amplifying unit, and optical coupler for the same | — | 2003-04-15 |
| 6538806 | Optical fiber for optical amplifier and fiber optic amplifier | Shinji Endo, Shinji Ishikawa | 2003-03-25 |
| 6538807 | Amplification optical fiber, fiber optic amplifier, optical transmitter, and optical communication system | Masahiro Takagi | 2003-03-25 |