Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9964360 | Method of manufacturing a slag discharge door | Joon-Seong Ki, Jin-Ill Hwang | 2018-05-08 |
| 8808615 | Tuyere for iron making furnace | — | 2014-08-19 |
| 7550109 | Double chamber single directional spiral tuyere for blast furnaces | — | 2009-06-23 |