Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10054738 | Optical waveguide and arrayed waveguide grating | Keiichi Morita, Kazumi Shimizu, Kouji Kawashima | 2018-08-21 |
| 9618694 | Optical waveguide and arrayed waveguide grating | Keiichi Morita, Kazumi Shimizu, Kouji Kawashima | 2017-04-11 |