Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4637586 | Form for producing concrete rails | — | 1987-01-20 |
| 4538521 | Recessible guide rail arrangement for a wheel-supported vehicle | — | 1985-09-03 |
| 4232822 | Method of and arrangement for correcting the height of railway upper structures | Volker Hahn | 1980-11-11 |