Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9977181 | Optical device and optical device manufacturing method | — | 2018-05-22 |
| 7561768 | Optical branching device | Akira Takada, Shigenori Nagano | 2009-07-14 |
| 7309168 | Optical fiber cable | Masayuki Momiuchi, Shigenori Nagano, Akira Takada | 2007-12-18 |