Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |