Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8281856 | Torque sub for use with top drive | Bernd-Georg Pietras, Karsten Heidecke | 2012-10-09 |
| 8047283 | Torque sub for use with top drive | Bernd-Georg Pietras, Karsten Heidecke | 2011-11-01 |
| 7757759 | Torque sub for use with top drive | Bernd-Georg Pietras, Karsten Heidecke | 2010-07-20 |
| 6288373 | Apparatus for amorphous bonding of tubulars | Bernd-Georg Pietras | 2001-09-11 |
| 5603536 | Linear preload fluid power operated latch | David R. Bauer | 1997-02-18 |