Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7062811 | Collapsible bridge and method of making and using same | Walter Steppacher | 2006-06-20 |
| 7017219 | Dismountable bridge | Werner Duerr | 2006-03-28 |
| 6918152 | Collapsible bridge and method of laying same | Werner Duerr | 2005-07-19 |
| 6446292 | Mobile bridge and method of making same | Friedrich Graf | 2002-09-10 |
| 6374445 | Tension rod for use as a chord for bridges | Friedrich Graf | 2002-04-23 |
| 5519909 | Trough bridge comprising nestable modules | — | 1996-05-28 |