Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11165501 | Excitation light source apparatus and optical transmission system | Katsunori Imanishi, Shun Chikamori, Kengo Takata | 2021-11-02 |
| 11128380 | Signal light interruption detection device, optical amplifier, optical wavelength multiplex transmission device, and optical wavelength multiplex transmission system | Kanehiro Matsumoto, Shun Chikamori, Kengo Takata | 2021-09-21 |
| 10971888 | Optical amplifier | Hiroshi Miura | 2021-04-06 |