Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6811144 | Apparatus with collapsible modules for absorbing energy from the impact of a vehicle | Gerrit A. Dyke, Jack S. Mazer | 2004-11-02 |
| 6536986 | Energy absorption apparatus with collapsible modules | Marco Anghileri, Franz Muller | 2003-03-25 |
| 6474904 | Traffic barrier with liquid filled modules | John W. Duckett, Jack S. Mazer | 2002-11-05 |
| 6173943 | Guardrail with slidable impact-receiving element | James B. Welch | 2001-01-16 |
| 6142452 | Highway barrier and guardrail | Patrick A. Leonhardt, Michael H. Oberth, James B. Welch, Lincoln C. Cobb | 2000-11-07 |
| 5967497 | Highway barrier and guardrail | Patrick A. Leonhardt, Michael H. Oberth, James B. Welch, Lincoln C. Cobb | 1999-10-19 |
| 5403113 | Shear loading energy absorbing device | David C. Gertz | 1995-04-04 |
| 4934661 | Inertial barrier array | William G. Krage | 1990-06-19 |
| 4784515 | Collapsible highway barrier | William G. Krage | 1988-11-15 |
| 4711481 | Vehicle impact attenuating device | William G. Krage, Barry D. Stephens | 1987-12-08 |
| 4666130 | Expanded cell crash cushion | George Ebersole | 1987-05-19 |
| 4607824 | Guardrail end terminal | William G. Krage | 1986-08-26 |
| 4352484 | Shear action and compression energy absorber | David C. Gertz | 1982-10-05 |