Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7506564 | Gripping system for a tong | — | 2009-03-24 |
| 7086461 | Combined grip control of elevator and spider slips | Bernd-Georg Pietras | 2006-08-08 |
| 6745646 | Apparatus and method for facilitating the connection of pipes | Bernd-Georg Pietras | 2004-06-08 |
| 6332377 | Gripping arrangement for gripping casing | Bernd-Georg Pietras, Andreas Carlsson | 2001-12-25 |
| 6322472 | Positioning device | — | 2001-11-27 |
| 5730471 | Apparatus for gripping a pipe | Bernd-Georg Pietras | 1998-03-24 |
| 5667026 | Positioning apparatus for a power tong | Jorg Lorenz | 1997-09-16 |
| 5484222 | Apparatus for gripping a pipe | — | 1996-01-16 |
| 5368113 | Device for positioning equipment | — | 1994-11-29 |
| 5259275 | Apparatus for connecting and disconnecting threaded members | — | 1993-11-09 |
| 5081888 | Apparatus for connecting and disconnecting threaded members | — | 1992-01-21 |
| 5044232 | Active jaw for a power tong | — | 1991-09-03 |
| 4688453 | Apparatus for making and braking connections between screw threaded tubular members | — | 1987-08-25 |