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| Number | Title | Issue Date |
| 7885159 | Optical disc drive device with anti-scraping mechanism The method prevents an optical disk from being scraped by an optical apparatus of a pickup head of an optical disc drive is disclosed, it mainly includes: moving the optical apparatus of the pickup head to a detection position in which the laser-light emitted from t... | 02/08/2011 |
| 7558176 | Method for preventing optical disk from being scraped The method prevents an optical disk from being scraped by an optical apparatus of a pickup head of an optical disc drive is disclosed, it mainly includes: moving the optical apparatus of the pickup head to a detection position in which the laser-light emitted from t... | 07/07/2009 |
