Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5574374 | Method and apparatus for interrogating a borehole and surrounding formation utilizing digitally controlled oscillators | Macmillan M. Wisler | 1996-11-12 |
| 5530358 | Method and apparatus for measurement-while-drilling utilizing improved antennas | Macmillan M. Wisler, William C. Paluch | 1996-06-25 |
| 5402068 | Method and apparatus for logging-while-drilling with improved performance through cancellation of systemic errors through combination of signals, utilization of dedicated transmitter drivers, and utilization of selected reference signals | Richard A. Meador, James E. Meisner, Ronald A. Hall, Edward S. Mumby | 1995-03-28 |
| 5081419 | High sensitivity well logging system having dual transmitter antennas and intermediate series resonant | Richard A. Meador, James E. Meisner, Ronald A. Hall, Edward S. Mumby | 1992-01-14 |
| 4785247 | Drill stem logging with electromagnetic waves and electrostatically-shielded and inductively-coupled transmitter and receiver elements | Richard A. Meador, William R. Grayson | 1988-11-15 |