Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10989985 | Wavelength converter | Naoya Ryoki, Akihiko Ishibashi, Masaki Nobuoka | 2021-04-27 |
| 10966203 | Transmission apparatus and transmission method using a plurality of divided frequency bands in a communication band | Takaaki Kishigami, Yoichi Nakagawa | 2021-03-30 |