Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8074419 | Unbonded non-masonry building block components | David L. Humphress | 2011-12-13 |
| 5046905 | Winged drill screw | Frank Piacenti | 1991-09-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8074419 | Unbonded non-masonry building block components | David L. Humphress | 2011-12-13 |
| 5046905 | Winged drill screw | Frank Piacenti | 1991-09-10 |