Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6975244 | Oscillating shear valve for mud pulse telemetry and associated methods of use | Detlef Hahn, Cedric Rouatbi, Heiko Eggers | 2005-12-13 |
| 6898150 | Hydraulically balanced reciprocating pulser valve for mud pulse telemetry | Detlef Hahn, Cedric Rouatbi | 2005-05-24 |