Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5605205 | Readily deployable portable escape ladder | Patrick Douglas, Kenneth R. Fenne | 1997-02-25 |
| D371854 | Ladder rung | Patrick Douglas, Kenneth R. Fenne | 1996-07-16 |
| D370736 | Escape ladder | Patrick Douglas, Kenneth R. Fenne | 1996-06-11 |