Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11091818 | High strength cold-rolled steel sheet and hot-dip galvanized steel sheet having excellent hole expansion, ductility and surface treatment properties, and method for manufacturing same | Jai-Hyun Kwak, Hang-Sik Cho | 2021-08-17 |
| 10519526 | High-strength cold rolled steel sheet having excellent ductility, hot-dip galvanized steel sheet and method for manufacturing same | Kyoo-Young Lee, Jai-Hyun Kwak, Joo-Hyun RYU, Se-Don Choo | 2019-12-31 |
| 10273556 | Lightweight steel sheet having excellent strength and ductility and method for manufacturing same | Jai-Hyun Kwak, Min-Seo KOO | 2019-04-30 |