Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6668048 | Conference communication system | Susumu Suga, Shoji Aizawa, Kazuhiro Takizawa, Ichiro Inoue | 2003-12-23 |
| 6577440 | Optical fiber for optical amplifier and fiber optic amplifier | Shinji Ishikawa, Motoki Kakui | 2003-06-10 |
| 6538806 | Optical fiber for optical amplifier and fiber optic amplifier | Shinji Ishikawa, Motoki Kakui | 2003-03-25 |