Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11201668 | Optical network system, optical node device, and optical network control method | Akio Tajima, Hitoshi Takeshita, Shinsuke Fujisawa | 2021-12-14 |
| 11143528 | Optical fiber sensor and analysis method | Akihiro Tanaka | 2021-10-12 |
| 11109123 | Optical network management apparatus and method of allocating optical frequency band | Hitoshi Takeshita, Shinsuke Fujisawa, Akio Tajima | 2021-08-31 |