Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10041861 | Apparatus and method for testing drilling efficiency of drill bit | Jung-Woo Cho, Dae Young Shin, Jae Wook Lee, Joo Young Oh, Jin Young Park +1 more | 2018-08-07 |
| 10006252 | Drill bit including button array having different radii extending from center of head section | Jung-Woo Cho, Dae Young Shin, Jin YANG, Kyoung-Il Moon, Ki Beom Kwon +1 more | 2018-06-26 |