Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6466351 | Multi-beam optical system | Takashi Iizuka | 2002-10-15 |
| 6388811 | Diffractive optical element including a diffractive grating pattern | Takashi Iizuka, Tsutomu Sato | 2002-05-14 |