Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9609401 | Optical switch, optical transmission device, and optical switching method | Ryuichi Ikematsu, Akio Tajima | 2017-03-28 |
| 9590725 | Multi-failure resolution optical node, optical communication system using same, and wavelength path switching method | — | 2017-03-07 |