Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6250038 | Block for retaining wall and method for the construction of retaining wall using the same | — | 2001-06-26 |
| 5707183 | Block for a retention wall of leaning type, retaining wall constructed with blocks therefor, and methods for the preparation and construction thereof | — | 1998-01-13 |
| 5567089 | Block for contstructing retaining wall and constructed retaining wall structure | — | 1996-10-22 |