Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9828890 | Valve opening and closing apparatus | Jae Hee Jeon, You Sang Son, Seock Joong Yoon | 2017-11-28 |
| 9822675 | Valve opening and closing apparatus | Jae Hee Jeon, You Sang Son, Seock Joong Yoon | 2017-11-21 |