Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10619006 | Dual metal cyanide catalyst, preparation method therefor, and method for preparing polycarbonate polyol by using catalyst | Joon-Hyun Baik, Il Beom Kim, Seong-hwan Yun, Jae-Hee Ha | 2020-04-14 |
| 5561649 | Disk recording medium and reproduction method and apparatus thereof | Rae-hwan Lee, Hwa-jin Jeon, Kwang-Sik Choi, Hong-Soon Park, Sang-hwa Yun +5 more | 1996-10-01 |
| 5546368 | Disk recording medium and reproduction method and apparatus thereof | Rae-hwan Lee, Hwa-jin Jeon, Kwang-Sik Choi, Hong-Soon Park, Sang-hwa Yun +5 more | 1996-08-13 |