Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680491 | Optical fiber dispersion compensation device for optical communication system | Masayuki Shigematsu, Masayuki Nishimura | 1997-10-21 |
| 5640269 | Optical fiber amplifier and optical amplifier repeater | Masayuki Shigematsu, Koji Nakazato, Masayuki Nishimura | 1997-06-17 |