Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4482270 | Drive shields for tunnel-driving apparatus | Eberhart Unger, Jurgen Hein | 1984-11-13 |
| 4474494 | Tunnel drive shield | Hans-Jurgen Diederich | 1984-10-02 |
| 4432665 | Tunnel driving apparatus | Herbert Heitkamp | 1984-02-21 |
| 4398845 | Tunnel driving apparatus | Hans Jutte | 1983-08-16 |
| 4334800 | Tunnel drive shield | — | 1982-06-15 |
| 4265565 | Tunnel drive shield | Hans Jutte | 1981-05-05 |