Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5435486 | Ballast-free permanent rail way having recessed tie with central fastening element | Rudolf Gerlach, Ralf Walter, Bernhard Schad, Gunther Leykauf | 1995-07-25 |
| 4905896 | Railroad roadway for high speed rail-mounted vehicles | Dieter Hilliges, Gunther Leykauf, Helmut Lieske, Herbert Schambeck, Werner Sievers | 1990-03-06 |
| 4718603 | Anchor for a railway tie embedded in ballast | Henning von Heimburg, Friedhelm Weber, Dirk Vorderbrück, Helmut Eisenberg | 1988-01-12 |