Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6179516 | Pipe rack crash cushion | RICHARD ZIMMER, III | 2001-01-30 |
| 6126144 | Barrel crash cushions | Teddy J. Hirsch | 2000-10-03 |
| 6089782 | Frame catcher adaptation for guardrail extruder terminal | Roger P. Bligh, Carl E. Buth, Hayes E. Ross, Jr. | 2000-07-18 |
| 5791812 | Collision performance side impact (automobile penetration guard) | — | 1998-08-11 |
| 5391016 | Metal beam rail terminal | Carl E. Buth, King K. Mak, Dean I. Sicking | 1995-02-21 |
| 5348416 | Gandy dancer: end piece for crash cushion or rail end treatment | King K. Mak | 1994-09-20 |
| 5302047 | Pedestrian safety barrier | — | 1994-04-12 |
| 5295757 | Safety end barrier for concrete road barriers | Hayes E. Ross, Jr., W. Lynn Beason | 1994-03-22 |
| 5156485 | Low profile concrete road barrier | Hayes E. Ross, Jr., W. Lynn Beason | 1992-10-20 |
| 4986687 | AD-IV breakaway system for timber utility poles | — | 1991-01-22 |
| 4909661 | Advanced dynamic impact extension module | — | 1990-03-20 |
| 4822208 | Advanced dynamic impact extension module | — | 1989-04-18 |