Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12325091 | Stainless steel welding wire for use in LNG tank manufacturing | Woong Kil, Chang Hyun Choi, Jae Heon JUNG | 2025-06-10 |
| 12269128 | Stainless steel flux cored wire for manufacturing LNG tank | Chang Hyun Choi, Woong Kil | 2025-04-08 |