Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7448088 | Knee pad | — | 2008-11-11 |
| 7370384 | Combination wedge and notch trowel with reversible grip handle | Norman L. Hill, Mark A. Longfellow, Norman C. Tracy, Thomas Nieto | 2008-05-13 |
| D557578 | Notch trowel | Norman L. Hill, Mark A. Longfellow, Norman C. Tracy | 2007-12-18 |