Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6606825 | Window opening and closing assembly | Jang-woo Lee, Gi-Won Lee | 2003-08-19 |
| 6592300 | Pile apparatus and construction process of placing concrete pile in ground | Won-Hoi Yang | 2003-07-15 |