Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6836378 | Objective lens design method, lens, and optical system, optical head, and optical disc apparatus using the same | Takesuke Maruyama | 2004-12-28 |
| 6721242 | Optical detector having three light receiving areas | Kunikazu Ohnishi, Takeshi Shimano, Shigeru Nakamura, Masayuki Inoue, Yukio Fukui +2 more | 2004-04-13 |
| 6678096 | Objective lens design method, lens, and optical system, optical head, and optical disc apparatus using the same | Takesuke Maruyama | 2004-01-13 |