Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5659558 | Short-wavelength laser element doped with rare earth ions, optical amplifier doped with rare earth ions, and wavelength converter doped with rare earth ions | Genji Tohmon, Tomoaki Uno | 1997-08-19 |
| 5623362 | Erbium-doped fiber amplifier and an optical fiber communication system | Masahiro Mitsuda | 1997-04-22 |
| 5598294 | Optical fiber amplifier and optical fiber communication system | Tomoaki Uno, Masahiro Mitsuda | 1997-01-28 |
| 5598491 | Optical fiber amplifier and optical fiber transmission apparatus | Tomoaki Uno, Masahiro Mitsuda | 1997-01-28 |