Issued Patents 2004
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6807019 | Objective lens having diffractive structure for optical pick-up | Koichi Maruyama | 2004-10-19 |
| 6791594 | Laser imaging apparatus | — | 2004-09-14 |
| 6791934 | Objective lens optical system, optical head and optical information reproduction apparatus | Takeshi Shimano, Tetsuo Ariyoshi, Kazuo Shigematsu, Koichi Maruyama | 2004-09-14 |
| 6781764 | Objective lens for optical pick-up | Koichi Maruyama | 2004-08-24 |
| 6741402 | Objective lens for optical head | Koichi Maruyama | 2004-05-25 |
| 6734890 | Scanning optical system | Daisuke Koreeda | 2004-05-11 |
| 6686948 | Laser imaging apparatus | — | 2004-02-03 |