Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12344923 | Zinc plated steel sheet having excellent spot weldability and manufacturing method thereof | Ki-Cheol Kang, Sea-Woong Lee, Jong Ho Kim, Young-Roc IM | 2025-07-01 |
| 12123066 | Ultrahigh-strength steel sheet having excellent yield ratio, and manufacturing method therefor | Sea-Woong Lee, Bruno C. De Cooman, Eun Jung Seo, Seon-Jong LEE, Joo-Hyun RYU +1 more | 2024-10-22 |
| 12000008 | Advanced high strength zinc plated steel sheet having excellent surface quality and electrical resistance spot weldability | Ki-Cheol Kang, Chung Hwan Lee, Yong Joo Kim, Kang-min Lee | 2024-06-04 |
| 11655517 | Ultrahigh-strength and high-ductility steel sheet having excellent cold formability | Joo-Hyun RYU, Sea-Woong 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, Sea-Woong Lee, Won-Hwi Lee | 2022-09-27 |
| 11299793 | Steel sheet having excellent resistance to liquid metal embrittlement cracks and method for manufacturing the same | Sea-Woong 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 | Joo-Hyun RYU, Sea-Woong Lee, Won-Hwi Lee, Byun-Mok Hwang | 2021-12-21 |
| 11186892 | Hot rolled steel sheet having excellent strength and elongation | Sung-Hak Lee, Joo-Hyun RYU, Sea-Woong Lee, Seok-Su SOHN, Hyung Soo Lee +1 more | 2021-11-30 |
| 10941467 | Cold-rolled steel sheet with excellent formability, galvanized steel sheet, and manufacturing method thereof | Chang-Hyo SEO, Yeon-Sang AHN, Joo-Hyun RYU, Won Pyo Hong | 2021-03-09 |
| 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, Sea-Woong Lee | 2021-02-02 |
| 10752968 | Ultrahigh-strength high-ductility steel sheet having excellent yield strength, and manufacturing method therefor | Joo-Hyun RYU, Sea-Woong Lee | 2020-08-25 |
| 10604820 | Method of continuously annealing a strip | Jai-Hyun Kwak, Hang-Sik Cho, Joo-Hyun RYU, Man-Young Park | 2020-03-31 |
| 10519526 | High-strength cold rolled steel sheet having excellent ductility, hot-dip galvanized steel sheet and method for manufacturing same | Jai-Hyun Kwak, Joo-Hyun RYU, Dong-Seoug Sin, Se-Don Choo | 2019-12-31 |
| 10358691 | Apparatus for continuous annealing of strip and method for continuous annealing of same | Jai-Hyun Kwak, Hang-Sik Cho, Joo-Hyun RYU, Man-Young Park | 2019-07-23 |
| 9856542 | Ferritic lightweight high-strength steel sheet having excellent stiffness and ductility, and method of manufacturing the same | Jai-Hyun Kwak, Kwang-Geun Chin | 2018-01-02 |
| 8685181 | Manufacturing method of carbon steel sheet superior in formability | Gyo-Sung Kim, Han-Chul Shin, Chang-Hoon Lee, Kee-Cheol Park, Jea-Chun Jeon | 2014-04-01 |
| 8465601 | High carbon steel sheet superior in tensile strength and elongation and method for manufacturing the same | Young-Roc IM, Jae-Kon Lee, Yeong-Woo Jeon, Jae Hwa Ryu, Kyong-Su Park | 2013-06-18 |
| 8197616 | Manufacturing method of carbon steel sheet superior in formability | Gyo-Sung Kim, Han-Chul Shin, Chang-Hoon Lee, Kee-Cheol Park, Jae-Chun Jeon | 2012-06-12 |