Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6822771 | Optical pickup unit and optical disk drive for accurate and stable information recording and reproduction | Shigeru Oohchida | 2004-11-23 |
| 6754162 | Optical pickup method, optical pickup device, and optical information processing apparatus adapted with spherical aberration correction for sub-spot tracking control | Kazuhiro Fujita, Hiroshi Koide | 2004-06-22 |