Issued Patents 1997
Showing 1–3 of 3 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, Jun Ohya | 1997-08-19 |
| 5598294 | Optical fiber amplifier and optical fiber communication system | Jun Ohya, Masahiro Mitsuda | 1997-01-28 |
| 5598491 | Optical fiber amplifier and optical fiber transmission apparatus | Jun Ohya, Masahiro Mitsuda | 1997-01-28 |