Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10012076 | Monitoring probe for detecting the position of a fresh water-salt water interface in an observation well | YongCheol KIM, Heesung Yoon, Kyoochul Ha, Dong-Chan Koh | 2018-07-03 |
| 8909485 | Method of measuring pumping amount of groundwater by using water level fluctuation and water level measuring sensor | Hee-Jun Suk | 2014-12-09 |
| 8650948 | Automatic seepage meter | Bong Joo Lee | 2014-02-18 |
| 8512557 | Radon reduction apparatus | Kil Yong Lee, Yoon Yeol Yoon | 2013-08-20 |
| 8429986 | Apparatus and method for groundwater sampling using hydraulic couplers | Bong Joo Lee | 2013-04-30 |
| 8070944 | Groundwater radon reduction apparatus | Kil Yong Lee, Yoon Yeol Yoon | 2011-12-06 |