Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5551810 | Retaining wall with an outer face and method of forming the same | John A. Franceski, Claus Ludwig | 1996-09-03 |
| 4836718 | Earth retaining method and structure with improved corrosion protection and drainage | — | 1989-06-06 |