Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6822796 | Diffractive optical element | Takuji Hatano, Koji Takahara, Koujirou Sekine | 2004-11-23 |
| 6791755 | Optical device for making light converge | Hiroshi Hatano | 2004-09-14 |
| 6785029 | Optical scanner | Takuji Hatano | 2004-08-31 |
| 6707588 | Photonic crystal device | — | 2004-03-16 |