Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7396423 | Method for manufacturing steel plate having superior toughness in weld heat-affected zone | Hong-Chul Jeong | 2008-07-08 |
| 7105066 | Steel plate having superior toughness in weld heat-affected zone and welded structure made therefrom | Hong-Chul Jeong | 2006-09-12 |
| 6966955 | Steel plate having TiN+ZrN precipitates for welded structures, method for manufacturing same and welded structure made therefrom | Hong-Chul Jeong | 2005-11-22 |
| 6946038 | Steel plate having Tin+MnS precipitates for welded structures, method for manufacturing same and welded structure | Hong-Chul Jeong, Wung-Yong Choo | 2005-09-20 |
| 6686061 | Steel plate having TiN+CuS precipitates for welded structures, method for manufacturing same and welded structure made therefrom | Hong-Chul Jeong | 2004-02-03 |
| 5575973 | High strength high toughness spring steel, and manufacturing process therefor | Won-Jun Nam, Jong-Kyo Choi, Soo D. Bark, Jong-Han Choi, Jang Gyun KIM | 1996-11-19 |