Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12344923 | Zinc plated steel sheet having excellent spot weldability and manufacturing method thereof | Ki-Cheol Kang, Kyoo-Young Lee, Jong Ho Kim, Young-Roc IM | 2025-07-01 |
| 12123066 | Ultrahigh-strength steel sheet having excellent yield ratio, and manufacturing method therefor | Bruno C. De Cooman, Kyoo-Young Lee, Eun Jung Seo, Seon-Jong LEE, Joo-Hyun RYU +1 more | 2024-10-22 |
| 11655517 | Ultrahigh-strength and high-ductility steel sheet having excellent cold formability | Joo-Hyun RYU, Kyoo-Young Lee | 2023-05-23 |
| 11453922 | Ultra-high-strength steel sheet having excellent hole expandability and yield ratio, and method of manufacturing the same | Joo-Hyun RYU, Kyoo-Young Lee, Won-Hwi Lee | 2022-09-27 |
| 11299793 | Steel sheet having excellent resistance to liquid metal embrittlement cracks and method for manufacturing the same | Kyoo-Young Lee, Joo-Hyun RYU, Ki-Cheol Kang | 2022-04-12 |
| 11203795 | Ultra-high strength steel plate having excellent formability and hole-expandability, and method for manufacturing same | Kyoo-Young Lee, Joo-Hyun RYU, Won-Hwi Lee, Byun-Mok Hwang | 2021-12-21 |
| 11186892 | Hot rolled steel sheet having excellent strength and elongation | Sung-Hak Lee, Kyoo-Young Lee, Joo-Hyun RYU, Seok-Su SOHN, Hyung Soo Lee +1 more | 2021-11-30 |
| 10907230 | Ultra high-strength and high-ductility steel sheet having excellent yield ratio and manufacturing method therefor | Joo-Hyun RYU, Nack-Joon Kim, Sung-Hak Lee, Won-Hwi Lee, Kyoo-Young Lee | 2021-02-02 |
| 10752968 | Ultrahigh-strength high-ductility steel sheet having excellent yield strength, and manufacturing method therefor | Kyoo-Young Lee, Joo-Hyun RYU | 2020-08-25 |