Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7690316 | Height-adjustable folding work platform | Jung-Hwan Lim | 2010-04-06 |
| 6651774 | Combined stepladder and hand truck assembly | — | 2003-11-25 |
| 4890950 | Positioning joint for a folding ladder | — | 1990-01-02 |
| 4815564 | Folding ladder | — | 1989-03-28 |
| 4770559 | Positioning joint for folding ladders | — | 1988-09-13 |