Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5797591 | Guardrail with improved ground anchor assembly | — | 1998-08-25 |
| 5425594 | Roadside barrier | John F. LaTurner, Jeffrey M. Thompson, James B. Welch | 1995-06-20 |
| 5022782 | Vehicle crash barrier | David C. Gertz | 1991-06-11 |
| 4934661 | Inertial barrier array | Owen S. Denman | 1990-06-19 |
| 4784515 | Collapsible highway barrier | Owen S. Denman | 1988-11-15 |
| 4711481 | Vehicle impact attenuating device | Barry D. Stephens, Owen S. Denman | 1987-12-08 |
| 4607824 | Guardrail end terminal | Owen S. Denman | 1986-08-26 |
| 4476982 | Method and apparatus for grading articles according to their surface color | Paul F. Paddock, Tim D. Conway | 1984-10-16 |