Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7790241 | Steel tube having improved corrosion-resistance and method for manufacturing the same | Gi Hyeoug Kim, Sun Chang Kim | 2010-09-07 |
| 7739980 | Apparatus for manufacturing steel tube and method for manufacturing the same | Gi Hyeoug Kim, Kyung Kim, Yong-Kil Kim, Sun Chang Kim, Jong-seo KIM | 2010-06-22 |