Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9677233 | Pedestrian barrier and barrier system | Donald C. Pyde | 2017-06-13 |
| 9581010 | Modular instrumented shell for a top drive assembly and method of using same | Jason Richard Anderson, James Edgar Standefer, James M. Burks | 2017-02-28 |
| 9181665 | Barrier system and connector | Barry D. Stephens | 2015-11-10 |
| 8556286 | Towable impact attenuator | Bret Eckert, Michael J. Buehler | 2013-10-15 |
| 8388012 | Towable impact attenuator | Michael J. Buehler, Bret Eckert | 2013-03-05 |
| 8348546 | Method for transferring a barrier | Douglas E. Wilkinson, Patrick A. Leonhardt, Michael H. Oberth, Barry D. Stephens, Sean Thompson +1 more | 2013-01-08 |
| 8136830 | Towable impact attenuator | Michael J. Buehler, Bret Eckert | 2012-03-20 |
| 8109692 | Barrier transfer device, system and method for the use thereof | Douglas E. Wilkinson, Patrick A. Leonhardt, Michael H. Oberth, Barry D. Stephens, Sean Thompson +1 more | 2012-02-07 |
| 7874572 | Towable impact attenuator | Michael J. Buehler, Bret Eckert | 2011-01-25 |
| 7037029 | Crash cushion with deflector skin | Michael J. Buehler | 2006-05-02 |
| 6942263 | Mount for truck mounted attenuator | Doug E. Wilkinson | 2005-09-13 |
| 6863467 | Crash cushion with deflector skin | Michael J. Buehler | 2005-03-08 |
| 6579034 | Highway crash attenuator frame | Lincoln C. Cobb | 2003-06-17 |
| 6427983 | Self-restoring highway crash attenuator | Patrick A. Leonhardt | 2002-08-06 |
| 6173943 | Guardrail with slidable impact-receiving element | Owen S. Denman | 2001-01-16 |
| 6142452 | Highway barrier and guardrail | Owen S. Denman, Patrick A. Leonhardt, Michael H. Oberth, Lincoln C. Cobb | 2000-11-07 |
| 5967497 | Highway barrier and guardrail | Owen S. Denman, Patrick A. Leonhardt, Michael H. Oberth, Lincoln C. Cobb | 1999-10-19 |
| 5425594 | Roadside barrier | William G. Krage, John F. LaTurner, Jeffrey M. Thompson | 1995-06-20 |
| 4583716 | Universal anchor assembly for impact attenuation device | Barry D. Stephens, Peter B. Morehead | 1986-04-22 |