Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6338511 | Root cutting shovel | William P. Killen | 2002-01-15 |
| 5830024 | Boat paddle having lateral force transmitting rib | William P. Killen | 1998-11-03 |
| 5239898 | Adjustable wrench mechanism | — | 1993-08-31 |