Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6062772 | Plastic block retaining wall with attached keylock facing panels | — | 2000-05-16 |
| D422092 | Keylock facing panel | — | 2000-03-28 |
| D404146 | Combined keylock facing panel and H-shaped retaining wall block | — | 1999-01-12 |
| 5788423 | Masonry block retaining wall with attached keylock facing panels and method of constructing the same | — | 1998-08-04 |