Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9840949 | Valve switching apparatus | You Sang Son | 2017-12-12 |
| 9828890 | Valve opening and closing apparatus | Min-Hui Yu, You Sang Son, Seock Joong Yoon | 2017-11-28 |
| 9822675 | Valve opening and closing apparatus | Min-Hui Yu, You Sang Son, Seock Joong Yoon | 2017-11-21 |