Sim; David F.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Sim; David F..The latest application filed is for "drill string system for performing measurement while drilling and logging while drilling operations".
- Sim; David F. - Alberta CA
- Sim; David F. - Calgary CA
| Patent | Date |
|---|---|
| Mud pulse landing assembly for use in directional drilling Grant 7,429,934 - Sim , et al. September 30, 2 | 2008-09-30 |
| Drill string system for performing measurement while drilling and logging while drilling operations App 20070227780 - MacPherson; Calum Robert ; et al. | 2007-10-04 |
| Mud pulse landing assembly for use in directional drilling App 20060098532 - Sim; David F. ; et al. | 2006-05-11 |
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