Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6831886 | Optical head and optical head device | Yasushi Kobayashi, Manami Kuiseko | 2004-12-14 |
| 6769642 | Pinch roller and pinch roller apparatus | Hitoshi Hamada, Atsushi Kato | 2004-08-03 |