Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11649138 | Elevator system monitoring and control based on hoistway wind speed | YiSug Kwon | 2023-05-16 |
| 9227306 | Ratcheting torque wrench head | — | 2016-01-05 |
| 6771185 | Parking guidance and management system | Chul Jin Yoo, Sang Gook Kim | 2004-08-03 |
| 6107942 | Parking guidance and management system | Chul Jin Yoo, Sang Gook Kim | 2000-08-22 |