|
| US3946392 | 19. Febr. 1975 | 23. März 1976 | The United States of America as represented by the Secretary of the Army | Electrically short transmission line antenna |
| US4169265 | 4. Mai 1978 | 25. Sept. 1979 | The United States of America as represented by the Secretary of the Army | P-Band loop antennas in radial array |
| US4217591 | 27. Aug. 1979 | 12. Aug. 1980 | The United States of America as represented by the Secretary of the Army | High frequency roll-bar loop antenna |
| US4441108 | 25. Aug. 1980 | 3. Apr. 1984 | U.S. Philips Corporation | Omnidirectional multiple-band antenna |
| US4651100 | 20. Aug. 1984 | 17. März 1987 | Dresser Industries, Inc. | Antenna construction for well logging of subsurface earth formations |
| US4678997 | 20. Aug. 1984 | 7. Juli 1987 | Dresser Industries, Inc. | Method and apparatus for dielectric well logging of subsurface earth formations with a lumped constant antenna |
| US4766384 | 20. Juni 1986 | 23. Aug. 1988 | Schlumberger Technology Corp. | Well logging apparatus for determining dip, azimuth, and invaded zone conductivity |
| US4857852 | 27. Apr. 1988 | 15. Aug. 1989 | Schlumberger Technology Corp. | Induction well logging apparatus with transformer coupled phase sensitive detector |
| US6680712 | 30. Jan. 2002 | 20. Jan. 2004 | Matsushita Electric Industrial Co., Ltd. | Antenna having a conductive case with an opening |
| US7339541 | 8. Apr. 2004 | 4. März 2008 | SPX Corporation | Wideband cavity-backed antenna |
