Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10352479 | Parallel cylinder type check valve | Jai Youl YANG, Jae Wook OH, Ji Yang | 2019-07-16 |
| 8991417 | Method for controlling pressure keeping facility for cooling and heating system provided with plurality of sensors | Ji Yang, Sang Ki Oh | 2015-03-31 |