Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5131786 | Traffic barrier and method of construction | Randall H. House, Johann Hofmann | 1992-07-21 |
| 4964750 | Traffic barrier and method of construction | Randall H. House | 1990-10-23 |
| 4961293 | Precast, prestressed concrete secondary containment vault | Randall H. House, Johann Hofmann, Jerry W. Powell, Jr. | 1990-10-09 |