Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6626253 | Oscillating shear valve for mud pulse telemetry | Detlef Hahn, Volker Peters | 2003-09-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6626253 | Oscillating shear valve for mud pulse telemetry | Detlef Hahn, Volker Peters | 2003-09-30 |