Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5920936 | Hinge couplings for the side walls of a trough bridge | Hans-Norbert Wiedeck | 1999-07-13 |
| 5414885 | Transportable bridge | Wolfgang Diefendahl, Johann Matuschek | 1995-05-16 |