Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6956800 | Pre-pit detecting apparatus detecting pre-pit signal from only signals input during period of applying light beam having reproducing power | — | 2005-10-18 |
| 6891784 | Apparatus and method for re-executing pre-pit detection if pre-pits are not detected after changing reference level | Naoharu Yanagawa, Shin Akabane, Takakazu Sugiyama | 2005-05-10 |