Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6533250 | Energy dissipating system for a concrete roadway barrier | — | 2003-03-18 |
| 6276667 | Energy dissipating system for a concrete barrier | — | 2001-08-21 |
| 5181695 | Anti-glare shield system for highway median barriers | — | 1993-01-26 |
| 4522530 | Self-erecting roadway marking post | — | 1985-06-11 |
| 4343567 | Self-erecting roadway marking post | Robert Brian Sarver | 1982-08-10 |