Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6481031 | Pillow oriented for comfort in varying sleeping positions | — | 2002-11-19 |
| 4863183 | Front-cargo tricycle | Yong Koo Hwang | 1989-09-05 |
| 4847919 | Ventilation band | Yong Ki HWANG | 1989-07-18 |