Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6822796 | Diffractive optical element | Kyu Takada, Takuji Hatano, Koji Takahara | 2004-11-23 |
| 6807330 | Optical switch using an optical waveguide | Naoki Nishida, Takuji Hatano, Koji Takahara, Shinji Maruyama, Miyuki Teramoto | 2004-10-19 |