Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6557794 | Coil shielding method for selective attenuation of an electromagnetic energy field component | Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Stephen D. Bonner, Brian Clark +1 more | 2003-05-06 |
| 6380744 | Shielding apparatus for selective attenuation of an electromagnetic energy field component | Brian Clark, Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Stephen D. Bonner +1 more | 2002-04-30 |
| 6351127 | Shielding method and apparatus for selective attenuation of an electromagnetic energy field component | Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Stephen D. Bonner, Brian Clark +1 more | 2002-02-26 |
| 6297639 | Method and apparatus for directional well logging with a shield having sloped slots | Brian Clark, Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Stephen D. Bonner +1 more | 2001-10-02 |
| 6049757 | Parametric modeling of well log data to remove periodic errors | Zlatko Sijercic | 2000-04-11 |
| 6047240 | Method and apparatus for evaluating the resistivity of invaded formations at high apparent dip angle | Zlatko Sijercic, Gerald N. Minerbo, Tracy E. Broussard | 2000-04-04 |
| 5184079 | Method and apparatus for correcting data developed from a well tool disposed at a dip angle in a wellbore to eliminate the effects of the dip angle on the data | — | 1993-02-02 |
| 4873488 | Induction logging sonde with metallic support having a coaxial insulating sleeve member | Richard N. Chandler, John F. Hunka | 1989-10-10 |
| 4837517 | Spatial frequency method and apparatus for investigating earth conductivity with high vertical resolution by induction techniques | — | 1989-06-06 |
| 4818946 | Method and apparatus for enhancing the resolution of an induction logging tool in measuring a characteristic of a borehole formation | — | 1989-04-04 |
| 4800496 | Method for determining induction sonde error | William B. Vandermeer, William D. Flanagan | 1989-01-24 |
| 4651101 | Induction logging sonde with metallic support | Richard N. Chandler, John F. Hunka | 1987-03-17 |
| 4513376 | Phasor processing of induction logs including skin effect correction | — | 1985-04-23 |
| 4471436 | Phasor processing of induction logs including shoulder and skin effect correction | Richard T. Schaefer, Clinton Dutcher | 1984-09-11 |