Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4393786 | Track crossing for a two track suspension railroad | Hans-Jurgen Dull | 1983-07-19 |
| 4389942 | Switch for a carriage of a two track suspension railroad | Hans-Jurgen Dull | 1983-06-28 |