Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6801491 | Focus error detecting apparatus of optical pickup with a light separating and astigmatism generation optical element and detection method thereof | Takuma Yanagisawa, Sakashi Ohtaki | 2004-10-05 |
| 6690500 | Aberration correction apparatus and method | Masayuki Iwasaki, Yoshitsugu Araki | 2004-02-10 |
| 6678232 | Aberration correcting element and assembly | Yoshitsugu Araki | 2004-01-13 |