Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667200 | Concrete building block system | — | 1997-09-16 |
| 5651642 | Concrete building blocks | Michael L. Kelley, Sr. | 1997-07-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667200 | Concrete building block system | — | 1997-09-16 |
| 5651642 | Concrete building blocks | Michael L. Kelley, Sr. | 1997-07-29 |