Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848963 | Earth pressure shield | Siegmund Babendererde, Hans-Jurgen Flunker, Gert Wittneben | 1989-07-18 |
| 4844656 | Earth pressure shield | Siegmund Babendererde | 1989-07-04 |
| 4820458 | Process for continuously lining a tunnel with extruded concrete | Siegmund Babendererde, Gunnar Lah | 1989-04-11 |
| 4789267 | Method of and apparatus for concrete tunnel lining | Siegmund Babendererde, Bernd Hillemeier | 1988-12-06 |
| 4768898 | Process and apparatus for continuously lining a tunnel with extruded concrete | Siegmund Babendererde, Gunnar Lah | 1988-09-06 |
| 4687374 | Method of and apparatus for concrete tunnel lining | Siegmund Babendererde, Bernd Hillemeier | 1987-08-18 |
| 4436448 | Excavating machine for tunnels and galleries | Wolf Magnus, Dirk Fischer, Werner Wippig | 1984-03-13 |