Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5435486 | Ballast-free permanent rail way having recessed tie with central fastening element | Rudolf Gerlach, Ralf Walter, Bernhard Schad, Josef Eisenmann | 1995-07-25 |
| 5135164 | Prestressed concrete railroad tie | Peter Auer, Josef Eisermann, Helmut Lieske, Peter Plica | 1992-08-04 |
| 4905896 | Railroad roadway for high speed rail-mounted vehicles | Josef Eisenmann, Dieter Hilliges, Helmut Lieske, Herbert Schambeck, Werner Sievers | 1990-03-06 |