Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4659398 | Method for reducing internal stresses of roller straightened rails | Wilhelm Heller, Lutz Weber, Jurgen Flugge | 1987-04-21 |
| 4230488 | Abrasion resistant rails and/or rail wheels, and process for producing the same | Wilhelm Heller, Walter Knoor | 1980-10-28 |