Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7066512 | Hole engaging multiple block lifting device | David Harris, Brett Harris | 2006-06-27 |
| 6736586 | Multiple set block lifting device | David Harris, Brett Harris | 2004-05-18 |
| 6513847 | Simple multiple concrete block lifting device | David Harris, Brett Harris | 2003-02-04 |
| 6481769 | Multiple building block lifting device | David Harris, Brett Harris | 2002-11-19 |