Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7050380 | Optical element, optical pickup unit, and optical disk drive unit | Hiroshi Akiyama | 2006-05-23 |
| 7006411 | Optical pickup unit having electro-optical element and information recording and reproduction apparatus | — | 2006-02-28 |
| 6735157 | Optical-pickup device and tilt-detecting method thereof | Hiroshi Koide, Hiroshi Akiyama | 2004-05-11 |
| 6545958 | Optical-pickup device and tilt-detecting method thereof | Hiroshi Koide, Hiroshi Akiyama | 2003-04-08 |