Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6349503 | Fluid powered barrier system | Klaus Silbermann, Arthur B. Dawson | 2002-02-26 |
| 6192627 | Lead screw barrier system | Arthur B. Dawson, Klaus Silbermann | 2001-02-27 |
| 6135190 | Chain barrier | Art Dawson | 2000-10-24 |
| 5871038 | Remote controlled mechanical chain barrier | Art Dawson | 1999-02-16 |