Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7025177 | Elevator system without machine | Sun-ho YANG, Kye Young Lim, Jong Hoon Park, Joon Tae Yeom, Jong Ho Suh | 2006-04-11 |
| 6340073 | Elevator door system | Hak Gi Han, Woo Young Lim | 2002-01-22 |
| 6052652 | Method for analyzing strength of structure and apparatus using the same | — | 2000-04-18 |