Issued Patents 2018
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10088199 | Coaxial ground heat exchanger and ground heat exchange system including the same | Dong Hyun Lee, Byung Sik Park, Chun Dong Park | 2018-10-02 |
| 10020710 | Poly-generation system | Gyu Sung Choi, Dong Hyun Lee | 2018-07-10 |
| 9964314 | Trigeneration energy supply system | Jae Yong Lee, Dong Hyun Lee | 2018-05-08 |
| 9951746 | Potential energy-based power generation system | Dong Hyun Lee, Jae Yong Lee | 2018-04-24 |