Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11845125 | Method for manufacturing cast iron casting with fining graphite and suspension part | — | 2023-12-19 |
| 11396041 | Method for manufacturing cast iron casting with fining graphite and suspension part | — | 2022-07-26 |
| 10487382 | High strength special steel | Sung Chul Cha, Jong Hwi Park, Seung Hyun Hong | 2019-11-26 |