Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644887 | Device for connecting a towed pipe to a towing apparatus | — | 2003-11-11 |
| 6491476 | Method and apparatus for the trenchless laying of pipework underground | — | 2002-12-10 |
| 6371220 | Pneumatically reversible ram drilling tool | Franz-Josef Puttmann | 2002-04-16 |
| 6199643 | Method and apparatus for directional boring | Franz-Josef Puttmann | 2001-03-13 |
| 6142244 | Percussion boring machine with run monitoring | — | 2000-11-07 |
| 6012536 | Method for steering a ground-drilling machine | Franz-Josef Puttmann | 2000-01-11 |
| 5960892 | Automatically driven pile driver drilling device | Gerhard Balve, Franz-Josef Puttmann | 1999-10-05 |
| 5954145 | Reversible percussion piston drill apparatus | Gerhard Balve, Franz-Josef Puttmann | 1999-09-21 |
| 5937954 | Method for directional drilling | Franz-Josef Puttmann | 1999-08-17 |
| 5937956 | Ram boring machine | — | 1999-08-17 |
| 5876152 | Ramming drill for destructive replacement of buried pipelines | — | 1999-03-02 |
| 5833015 | Method and apparatus for sinking pipes or cables into a pilot borehole | Joachim Schmidt, Dieter Wurm, Klaus Zerbs | 1998-11-10 |
| 5795991 | Arrangement of an impact-sensitive device in a housing | Franz-Josef Puttman | 1998-08-18 |
| 5692576 | Locating device for percussion boring machines | Joachim Schmidt | 1997-12-02 |
| 5642786 | Securing and tensioning device for a towing cable connected to a percussion boring machine | Franz-Josef Puttmann | 1997-07-01 |
| 5558167 | Percussion boring machine | — | 1996-09-24 |
| 5238072 | Pipe rammer | — | 1993-08-24 |
| 5234061 | Percussion machine, for example self-propelled ram boring machine | — | 1993-08-10 |
| 5148878 | Ram boring machine | Paul Wayne Schmidt, Gerhard Balve, Franz-Josef Puttmann | 1992-09-22 |
| 5127481 | Percussion boring machine for destructive replacement of buried pipelines | — | 1992-07-07 |
| 5125462 | Quick-change ram boring head | — | 1992-06-30 |
| 5110237 | Ramming device | — | 1992-05-05 |
| 5096000 | Process and apparatus for laying service lines without excavation | — | 1992-03-17 |
| 5095998 | Ram boring machine | Herbert Hupertz | 1992-03-17 |
| 5074364 | Ram boring machine | — | 1991-12-24 |