Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4718603 | Anchor for a railway tie embedded in ballast | Josef Eisenmann, Friedhelm Weber, Dirk Vorderbrück, Helmut Eisenberg | 1988-01-12 |
| 4718604 | Clamp and fastening arrangement for rails | Helmut Eisenberg, Friedhelm Weber, Achim Beste, Dirk Vorderbrück | 1988-01-12 |
| 4705215 | Arrangement for securing railway rails onto sleepers | Helmut Eisenberg, Friedhelm Weber, Achim Beste, Dirk Vorderbrück | 1987-11-10 |