Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826133 | Optimizing a distance between lenses of a two objective lens for minimizing wavefront aberration and offsetting focus control | Tatsuya Narahara, Kiyoshi Osato | 2004-11-30 |
| 6683845 | Optical recording medium, method of producing same, and optical recording and reproduction device | Koichiro Kishima, Yuji Kuroda, Kiyoshi Osato, Kimihiro Saito | 2004-01-27 |
| 6683846 | Information recording disc having an anti-reflection layer and information recording/reproducing apparatus | Koichiro Kishima, Yuji Kuroda, Kiyoshi Osato | 2004-01-27 |
| 6674696 | Focus controlling apparatus and method, and optical disc drive | Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe | 2004-01-06 |