Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8018822 | Optical information recording medium | Takeshi Otsu, Fumi Hara, Atsuo Shimizu, Motomitsu Hagiwara | 2011-09-13 |
| 7936661 | Optical information recording medium | Atsuo Shimizu | 2011-05-03 |