Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6814149 | Apparatus and method for positioning a tubular relative to a tong | Martin Liess, Andreas Carlsson, Bernd-Georg Pietras | 2004-11-09 |
| 6082224 | Power tong | Gary McDaniels, Patrick Cummings, Michael Hayes, Steven Albright, Bernd-Georg Pietras +1 more | 2000-07-04 |
| 4895056 | Tong and belt apparatus for a tong | — | 1990-01-23 |
| 4776243 | Hydraulic safety interlock system | Hans-Christian Bock | 1988-10-11 |
| 4192206 | Apparatus for rotating a tubular member | — | 1980-03-11 |