Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856936 | Form for concrete-placement tunnel lining | Clemens Versteegen, Jens Gloyer, Siegmund Babendererde | 1989-08-15 |
| 4854776 | Process and apparatus for lining a tunnel with concrete | Clemens Versteegen, Olaf Mahmens, Siegmund Babendererde | 1989-08-08 |
| 4785559 | Excavator for making a substantially vertical slot in the ground | — | 1988-11-22 |
| 4744425 | Apparatus for excavating a substantially vertical slot | — | 1988-05-17 |
| 4729693 | Tunnel excavator | — | 1988-03-08 |
| 4645378 | Movable form front for a tunnel-lining form | — | 1987-02-24 |
| 4640646 | Apparatus for the construction of tunnels and shafts | — | 1987-02-03 |
| 4627765 | Tunneling machine | — | 1986-12-09 |
| 4621948 | Tunnel lining form | — | 1986-11-11 |
| 4613258 | Apparatus for setting and removing tunnel casing rings | — | 1986-09-23 |
| 4568202 | Bearing arrangement for a boring head of a tunneling machine | — | 1986-02-04 |