Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8248266 | Bidirectional telemetry apparatus and methods for wellbore operations | John D. Macpherson, Ralf Zaeper, Volker Krueger | 2012-08-21 |
| 7477161 | Bidirectional telemetry apparatus and methods for wellbore operations | John D. Macpherson, Ralf Zaeper, Volker Krueger | 2009-01-13 |