Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D331469 | Spacer joint for use in a block wall | — | 1992-12-01 |
| 5146725 | Spacer member for construction elements | Mary L. Bruce, Larell Harris | 1992-09-15 |
| 4986048 | Method and apparatus for erecting a glass block wall | — | 1991-01-22 |