Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12077923 | Prestressed girder for concrete bridges with an incorporated concrete overhang and vertical stay-in-place form and method for using same | Jorge D. Hinojosa | 2024-09-03 |
| 8079774 | Traffic barrier with quick-bolt connection system | Jorge D. Hinojosa, Freddie C. Birck, Randall Frerich | 2011-12-20 |
| 5588786 | Combination retaining wall and method of construction | Johann Hofmann, Freddie C. Birck | 1996-12-31 |
| 5509249 | Combination column and panel barrier system and method of construction | Freddie C. Birck, Johann Hofmann | 1996-04-23 |
| 5471811 | Combination traffic barrier and retaining wall and method of construction | Johann Hofmann, Freddie C. Birck | 1995-12-05 |
| 5400563 | Combination column and panel barrier system and method of construction | Freddie C. Birck, Johann Hofmann | 1995-03-28 |
| 5131786 | Traffic barrier and method of construction | Jesse Covarrubias, Johann Hofmann | 1992-07-21 |
| 4964750 | Traffic barrier and method of construction | Jesse Covarrubias | 1990-10-23 |
| 4961293 | Precast, prestressed concrete secondary containment vault | Jesse Covarrubias, Johann Hofmann, Jerry W. Powell, Jr. | 1990-10-09 |