Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6490078 | Optical fiber for optical amplifier, optical fiber amplifier and optical fiber laser | Tadashi Enomoto, Masahiro Takagi, Yuichi Ohga, Shinji Ishikawa, Masakazu Shigehara +1 more | 2002-12-03 |
| 6456428 | Optical amplifier | Haruo Nakaji | 2002-09-24 |
| 6453103 | Optical communication system | Toshiaki Okuno | 2002-09-17 |