Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6822796 | Diffractive optical element | Kyu Takada, Koji Takahara, Koujirou Sekine | 2004-11-23 |
| 6807330 | Optical switch using an optical waveguide | Naoki Nishida, Koji Takahara, Shinji Maruyama, Miyuki Teramoto, Koujirou Sekine | 2004-10-19 |
| 6785029 | Optical scanner | Kyu Takada | 2004-08-31 |