Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6776558 | Method and arrangement for concreting vertical shafts | — | 2004-08-17 |
| 5749678 | Device for driving a tunnel or drain pipe | Arnold Wayne Diehl | 1998-05-12 |
| 5209649 | Control system for a two-cylinder thick matter pump | Hartmut Benckert | 1993-05-11 |
| 5190449 | Material feed tank for sludge pumps | Hellmut Hurr, Hartmut Benckert | 1993-03-02 |