Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7557993 | Optical pickup and optical disc device | — | 2009-07-07 |
| 7116412 | Angle detection optical system, angle detection apparatus, optical signal switch system and information recording and reproduction system | Koichi Takahashi | 2006-10-03 |