Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10767325 | Impact absorbing traffic noise barrier system | Robert G. Rex | 2020-09-08 |
| 8616331 | Panel assembly for traffic noise barrier wall | Stephen D. Barratt, Ray Stauffer, Paul D. Nowicki, John H. Miller, Nathan Binette | 2013-12-31 |
| 7546900 | Panel assembly for traffic noise barrier wall | Stephen D. Barratt, Ray Stauffer, Paul D. Nowicki, John H. Miller | 2009-06-16 |
| 7220077 | Traffic noise barrier system | Stephen D. Barratt, Ronald Keith Faller, Keith J. Kurz, Dean L. Sicking | 2007-05-22 |
| 7104720 | Traffic noise barrier system | Stephen D. Barratt | 2006-09-12 |