Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6441951 | Optical amplification apparatus using Raman amplification | Miki Onaka, Etsuko Hayashi, Yasushi Sugaya | 2002-08-27 |
| 6388801 | Optical amplification apparatus utilizing Raman amplification and controlling method thereof | Yasushi Sugaya, Etsuko Hayashi | 2002-05-14 |