Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8721886 | River water purification apparatus and method using treatment soil layer and permeable filtering medium layer | Kyu Hong Ahn, Kyung Guen Song, Kang Woo Cho, Dong-Won Ki, Jin-woo Cho +2 more | 2014-05-13 |