Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D585712 | Double groove concrete jointer | David A Lawrence | 2009-02-03 |
| D584586 | Single groove concrete jointer | David A Lawrence | 2009-01-13 |
| D584587 | Triple groove concrete jointer | David A Lawrence | 2009-01-13 |