Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7738342 | Optical pickup device | — | 2010-06-15 |
| 7277642 | Fine displacement detection device by sound or the like | — | 2007-10-02 |
| 7045768 | Displacement/quantity of light converter | Yoshio Sakamoto | 2006-05-16 |