| Patents for G01V 3 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation (25,929) |
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| 06/17/1986 | US4595877 Inductive loop system for detection of an electrically conductive object |
| 06/17/1986 | CA1206201A1 Method of detecting current geodynamic movements in massif |
| 06/10/1986 | US4594552 Logging method and apparatus for measuring earth formation resistivity as well as arm mechanism for the same |
| 06/10/1986 | US4594551 Method of deep penetration well logging using three receivers |
| 06/10/1986 | US4593770 Method for preventing the drilling of a new well into one of a plurality of production wells |
| 06/05/1986 | WO1986003305A1 A method for radar mapping an area and a radar equipment to carry out the method |
| 06/05/1986 | WO1986003304A1 Flux gate sensor |
| 06/03/1986 | US4593275 Safety device for detecting a conductive liquid |
| 05/28/1986 | EP0181935A1 Microwave radiometer using fanbeam inversion. |
| 05/27/1986 | US4591791 Electromagnetic array profiling survey method |
| 05/13/1986 | US4588951 Arm apparatus for pad-type logging devices |
| 05/13/1986 | US4588348 Robotic system utilizing a tactile sensor array |
| 05/13/1986 | CA1204486A1 Marker for subterranean marking and a novel application for such a marker |
| 05/09/1986 | WO1986002583A1 Process and device for detecting slag |
| 05/09/1986 | WO1986002539A1 Device for localizing metal objects in a human or animal body |
| 05/07/1986 | EP0180185A2 Method and apparatus for detecting an object |
| 04/30/1986 | EP0179601A2 Microwave reflection survey method |
| 04/15/1986 | US4583095 Radar seismograph improvement |
| 04/15/1986 | US4583046 Apparatus for focused electrode induced polarization logging |
| 04/15/1986 | US4583045 Pulsed induction logging for determining invaded zone properties |
| 04/15/1986 | CA1203304A1 Apparatus for detecting metal objects |
| 04/08/1986 | US4581584 Microwave electromagnetic borehole dipmeter |
| 04/01/1986 | US4580132 Method of and apparatus for detecting electrically conductive material in glass fibers or articles made of glass fibers |
| 04/01/1986 | CA1202712A1 Universal interface method and apparatus for subsurface earth formation testing |
| 04/01/1986 | CA1202676A1 Airbone electromagnetic surveying with correction for relative transmitter and receiver oscillation |
| 03/27/1986 | WO1986001924A1 Method and apparatus for producing electromagnetic surveillance fields |
| 03/25/1986 | US4578675 Apparatus and method for logging wells while drilling |
| 03/25/1986 | US4578645 Borehole logging tool utilizing electromagnetic energy in the determination of dip of subsurface formations surrounding a borehole |
| 03/25/1986 | CA1202398A1 Circuits for determining very accurately the position of a device inside biological tissue |
| 03/19/1986 | EP0174328A1 Measurement using electrical transducers |
| 03/18/1986 | US4577153 For detecting geological anomalies in underground coal seam formations |
| 03/13/1986 | WO1986001609A1 Method of geophysical surveying polymetallic ore bodies |
| 03/11/1986 | US4575681 Insulating and electrode structure for a drill string |
| 03/10/1986 | CN85103827A Industry frequency interference removal device used in the measurement of geoghysical electricity and megnetics variables |
| 03/04/1986 | US4574242 Electromagnetic logging with reduction of spurious transverse magnetic components |
| 03/04/1986 | US4574241 Marine surveying apparatus and method for locating pipelines buried under the seabed |
| 03/04/1986 | US4573829 Plastic-pipe locator tool |
| 02/26/1986 | EP0172393A1 Oscillator/demodulator circuit arrangement for an inductive proximity switch |
| 02/25/1986 | US4573016 Coating metal wire with electroconductive polymer and positioning it alongside pipes |
| 02/13/1986 | WO1986001003A1 Method of geophysical surveying polymictic ore bodies |
| 02/13/1986 | WO1986001002A1 Device for recording seismoelectric signals |
| 02/13/1986 | WO1986000877A1 Magnetoresistive sensor for producing electric signals |
| 02/11/1986 | US4570123 Electrode array for measurement of borehole resistivity |
| 02/11/1986 | US4570122 Magnetic exploration with reduction of magnetic data to the equator |
| 02/04/1986 | US4568937 Induction loop vehicle detector |
| 02/04/1986 | US4568932 Method and apparatus for obtaining high resolution subsurface geophysical measurements |
| 02/04/1986 | US4567759 Method and apparatus for producing an image log of a wall of a borehole penetrating an earth formation |
| 01/29/1986 | EP0169582A1 Proximity switch |
| 01/28/1986 | US4567410 Capacitive article density monitor |
| 01/21/1986 | USRE32070 Borehole apparatus for investigating subsurface earth formations including a plurality of pad members and means for regulating the bearing pressure thereof |
| 01/21/1986 | CA1199681A1 Deconvolution filter for induction log processing |
| 01/16/1986 | WO1986000410A1 Methods and apparatus employing spontaneous resonance |
| 01/07/1986 | US4563645 Inductively balanced oscillatory coil current for metal detection |
| 01/07/1986 | US4563644 Device for detecting metallic objects in a flow of non-metallic material |
| 01/07/1986 | US4563643 Eddy current proximity sensor for use in a hostile turbine environment |
| 01/07/1986 | CA1199063A1 Method and apparatus for dynamic range control |
| 12/27/1985 | EP0165256A1 Object detector |
| 12/24/1985 | US4560935 Remote actuator for metal detector discriminating adjust switch |
| 12/24/1985 | US4560663 Well logging method using electron spin resonance signals from hydrocarbon crude |
| 12/17/1985 | CA1198165A1 Means for metallic object detection |
| 12/04/1985 | EP0163574A2 Apparatus for microinductive investigation of earth formations |
| 11/26/1985 | CA1197296A1 Telecommunications cable splice closures |
| 11/21/1985 | WO1985005189A1 Interferometric radiometer |
| 11/21/1985 | WO1985005188A1 Microwave radiometer using fanbeam inversion |
| 11/19/1985 | US4554546 Receiver for a sounder permitting the detection and measurement of phonomena linked with the earths environment |
| 11/12/1985 | US4553097 For investigating properties of earth formations surrounding a borehole |
| 11/12/1985 | US4552134 Equipment for determining the position of a metal body in a medium with low electric conductivity |
| 11/12/1985 | CA1196689A2 Transient current geophysical prospecting process and device |
| 11/12/1985 | CA1196688A1 Method and device for predicting earthquakes |
| 11/05/1985 | US4551681 Magnetic susceptibility well-logging unit with single power supply thermoregulation system |
| 10/30/1985 | EP0159944A2 Method and apparatus for obtaining properties of subsurface formations |
| 10/30/1985 | EP0159838A2 Microwave electromagnetic borehole dipmeter |
| 10/29/1985 | CA1196059A1 Phasor processing of induction logs including shoulder and skin effect correction |
| 10/23/1985 | EP0159270A2 Method for determining properties of subsurface formations |
| 10/23/1985 | EP0159094A2 Apparatus for detecting metal debris particles |
| 10/22/1985 | US4549039 Telecommunications cable splice closures |
| 10/16/1985 | EP0158495A2 System and method for real time data collection surveying and processing |
| 10/15/1985 | US4547733 Amplitude and phase measurement in electromagnetic logging |
| 10/14/1985 | EP0113736A4 A method and apparatus for determining the trace and depth of underground metallic conductors. |
| 10/08/1985 | CA1194960A1 Fixing a geographical reference of a vehicle travelling through a pipeline |
| 10/01/1985 | US4544892 Signal processing apparatus for frequency domain geophysical electromagnetic surveying system |
| 10/01/1985 | EP0122932A4 Well logging sleeve and method for making same. |
| 10/01/1985 | CA1194580A1 Metal detector apparatus |
| 09/24/1985 | US4543527 Proximity switch exhibiting improved start-up characteristics |
| 09/24/1985 | CA1194177A1 Metal detection apparatus |
| 09/24/1985 | CA1194111A1 Borehole azimuth determination using magnetic field sensor |
| 09/24/1985 | CA1194110A1 Phasor processing of induction logs including skin effect correction |
| 09/24/1985 | CA1194109A1 Digital induction logging technique |
| 09/17/1985 | US4542344 Detecting buried pipeline depth and location with electromagnetic triangulation |
| 09/17/1985 | US4542334 For burying a submarine cable that has previously been on submerged surface |
| 09/17/1985 | US4541275 Log correlation method and apparatus |
| 09/12/1985 | WO1985004005A1 Measurement using electrical transducers |
| 09/11/1985 | EP0154535A2 Secondary field dielectric constant well logging system and method |
| 09/10/1985 | US4540943 Belt-supported swingable metal detector |
| 09/10/1985 | US4540942 Alternating current induction method using an annular magnetic coupling body for detecting the position of a buried submarine cable |
| 09/04/1985 | EP0153339A1 A search device for localizing subterranean resonant fixpoint markers |
| 08/29/1985 | WO1985003831A1 Identification system |
| 08/29/1985 | WO1985003793A1 Method and system for detecting an indicating device |
| 08/28/1985 | EP0153286A2 Method and system for detecting an indicating device |
| 08/28/1985 | EP0153202A2 Microwave detection system |