Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6351127 | Shielding method and apparatus for selective attenuation of an electromagnetic energy field component | Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Brian Clark, Scott S. Chesser +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, Scott S. Chesser +1 more | 2001-10-02 |
| 5463320 | Apparatus and method for determining the resitivity of underground formations surrounding a borehole | Richard A. Rosthal, Abdullah A. Bagersh, Martin G. Luling, Jacques Jundt | 1995-10-31 |
| 5359324 | Well logging apparatus for investigating earth formations | Brian Clark, Jacques Jundt, Martin G. Luling | 1994-10-25 |
| 5339037 | Apparatus and method for determining the resistivity of earth formations | Richard A. Rosthal, Abdullah A. Bagersh | 1994-08-16 |
| 5339036 | Logging while drilling apparatus with blade mounted electrode for determining resistivity of surrounding formation | Brian Clark, Jacques Jundt, Martin G. Luling | 1994-08-16 |
| 5235285 | Well logging apparatus having toroidal induction antenna for measuring, while drilling, resistivity of earth formations | Brian Clark, Jacques Jundt, Martin G. Luling | 1993-08-10 |
| 5200705 | Dipmeter apparatus and method using transducer array having longitudinally spaced transducers | Brian Clark, Jacques Jundt, Martin G. Luling, Richard A. Rosthal | 1993-04-06 |
| 4292589 | Eddy current method and apparatus for inspecting ferromagnetic tubular members | — | 1981-09-29 |