Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4962556 | Lightweight, collapsible bridge module, and system with deployment and retrieval trailer | Richard W. Helmke, David C. Smith | 1990-10-16 |
| 4575782 | Collision avoidance light | Robert H. Hanes, Joel Rudder, David Ditlya | 1986-03-11 |