Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8534578 | Method and apparatus for recovering valuable metals from slag and manufacturing multifunctional aggregate | Jinill Hwang | 2013-09-17 |
| 8409494 | Slag discharge door apparatus for electric furnace | Jinill Hwang | 2013-04-02 |