| 12227910 |
Crash cushion |
Sean Thompson |
2025-02-18 |
| 11970826 |
Crash cushion |
Sean Thompson |
2024-04-30 |
| RE47626 |
End terminal |
Brian E. Smith, Barry D. Stephens |
2019-10-01 |
| 10047488 |
Frangible post for highway barrier end terminals |
— |
2018-08-14 |
| 9790653 |
Energy absorbing vehicle barrier |
Sean Thompson, Aaron J. Cox |
2017-10-17 |
| 9399845 |
Crash attenuator |
Michael J. Buehler, Sean Thompson |
2016-07-26 |
| 9200417 |
Guardrail system with a releasable post |
Brian E. Smith |
2015-12-01 |
| 8905382 |
End terminal |
Brian E. Smith, Barry D. Stephens |
2014-12-09 |
| 8469626 |
Energy absorbing vehicle barrier |
Sean Thompson, Aaron J. Cox |
2013-06-25 |
| 8360400 |
Guardrail assembly, breakaway support post for a guardrail and methods for the assembly and use thereof |
Barry D. Stephens, Michael J. Buehler, Brent S. Sindorf |
2013-01-29 |
| 8348546 |
Method for transferring a barrier |
James B. Welch, Douglas E. Wilkinson, Michael H. Oberth, Barry D. Stephens, Sean Thompson +1 more |
2013-01-08 |
| 8215619 |
Guardrail assembly, breakaway support post for a guardrail and methods for the assembly and use thereof |
Barry D. Stephens, Michael J. Buehler, Brent S. Sindorf |
2012-07-10 |
| 8182169 |
Energy absorbing vehicle barrier |
Sean Thompson, Samuel Ross Stanley, Jr., Donald C. Pyde |
2012-05-22 |
| 8109692 |
Barrier transfer device, system and method for the use thereof |
James B. Welch, Douglas E. Wilkinson, Michael H. Oberth, Barry D. Stephens, Sean Thompson +1 more |
2012-02-07 |
| 7950870 |
Energy absorbing vehicle barrier |
Sean Thompson, Samuel Ross Stanley, Jr., Donald C. Pyde |
2011-05-31 |
| 7090392 |
Roadway freezing point monitoring system and method |
— |
2006-08-15 |
| 6905282 |
Vehicle mounted crash attenuator |
Andrew Porterfield |
2005-06-14 |
| 6695469 |
Roadway freezing point monitoring system and method |
— |
2004-02-24 |
| 6481920 |
Highway crash cushion |
Lincoln C. Cobb, John V. Machado |
2002-11-19 |
| 6427983 |
Self-restoring highway crash attenuator |
James B. Welch |
2002-08-06 |
| 6244637 |
Adjustable tailgate mount for truck mounted attenuator |
Lincoln C. Cobb, John V. Machado, Michael J. Buehler |
2001-06-12 |
| 6142452 |
Highway barrier and guardrail |
Owen S. Denman, Michael H. Oberth, James B. Welch, Lincoln C. Cobb |
2000-11-07 |
| 6092959 |
Method for decelerating a vehicle, highway crash cushion, and energy absorbing element therefor |
Lincoln C. Cobb, John V. Machado |
2000-07-25 |
| 5967497 |
Highway barrier and guardrail |
Owen S. Denman, Michael H. Oberth, James B. Welch, Lincoln C. Cobb |
1999-10-19 |