Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6756009 | Method of producing hardmetal-bonded metal component | Dong Sim, Keun Chul Song, Jung Hwan Cho | 2004-06-29 |
| 6039033 | Apparatus of exhaust gas recirculation valve for an internal combustion engine | Hong Lee | 2000-03-21 |
| 6021939 | Method of producing a wear resistant mechanical component | Tong Seub Shim | 2000-02-08 |