Issued Patents 2004
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6829947 | Acoustic Doppler downhole fluid flow measurement | Wei Han, Jean Michel Beique, James R. Birchak, Alan Hemphill, Tim Wiemers | 2004-12-14 |
| 6825659 | Method and apparatus for nuclear magnetic resonance measuring while drilling | Manfred G. Prammer, James H. Dudley, Peter Masak, George David Goodman, Marian Morys +5 more | 2004-11-30 |
| 6791469 | Method of drilling in response to looking ahead of the bit | M. Vikram Rao | 2004-09-14 |
| 6781520 | Motion sensor for noise cancellation in borehole electromagnetic telemetry system | Harrison C. Smith, Wallace R. Gardner | 2004-08-24 |
| 6781521 | Filters for canceling multiple noise sources in borehole electromagnetic telemetry system | Wallace R. Gardner, Harrison C. Smith | 2004-08-24 |
| 6750783 | Low frequency electromagnetic telemetry system employing high cardinality phase shift keying | — | 2004-06-15 |