Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8077383 | Optical amplifier | Tomoaki Takeyama, Keiko Sasaki | 2011-12-13 |
| 8026538 | Photo-detecting apparatus and photo-detecting method | Tomoaki Takeyama, Keiko Sasaki | 2011-09-27 |
| 8027082 | Raman amplifier and excitation light source used thereof | Tomoaki Takeyama | 2011-09-27 |
| 7990608 | Optical transmission system | Tomoaki Takeyama, Keiko Sasaki | 2011-08-02 |