Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12085306 | Geothermal system using single water supply system for heating and cooling smart farm and building, and method for constructing geothermal system | Hyeon Ho Chang, Sung Ouk Choi, Sang Gin Park | 2024-09-10 |
| 12025350 | Geothermal system comprising multitube vertically-sealed underground heat-exchanger and method for installing same | Hyeon Ho Chang, Sung Ouk Choi, Young-Hwa Kim, Jo Bum An | 2024-07-02 |
| 10895056 | Shielding apparatus for high-depth groundwater well pollution prevention grouting | Sung Ouk Choi, Sang Gin Park | 2021-01-19 |
| 6698976 | Grouting pipe equipment and method of grouting using the same for an underground water well | — | 2004-03-02 |