| 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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| 11/24/1992 | US5166676 A transponder |
| 11/24/1992 | US5166622 Method of locating fresh water springs in the oceans and supplying the fresh water to land for use |
| 11/24/1992 | US5165490 Boring tool having electromagnetic wave generation capability |
| 11/23/1992 | CA2068098A1 Method and apparatus for sensing proximity of an object using near-fieldeffects |
| 11/19/1992 | EP0513399A1 Game machine using metallic body as medium |
| 11/19/1992 | EP0513395A1 Sensor for sensing existence position of metallic body |
| 11/17/1992 | CA1310389C System for detecting underground objects |
| 11/17/1992 | CA1310383C Random-filament, multi-directionally responsive marker for use in electronic article surveillance systems |
| 11/12/1992 | WO1992019989A1 Airborne transient electromagnetic method with ground loops |
| 11/12/1992 | WO1992019979A1 Methods and apparatus for detecting substances |
| 11/12/1992 | DE4115350A1 Foreign body detection appts. for material flow, esp. of food - compares signals from two spaced apart detectors after filtering noise signal, to allow detection of very small foreign body |
| 11/11/1992 | EP0512756A1 Geophysical prospecting |
| 11/10/1992 | US5162740 Electrode array construction featuring current emitting electrodes and resistive sheet guard electrode for investigating formations along a borehole |
| 11/03/1992 | US5160885 Metal detecting apparatus and apparatus including guide housing for guiding a metal test piece, for testing metal detecting apparatus |
| 11/03/1992 | US5159978 Connecting apparatus for logging tools including electrical feedthrough and isolation system with bridle assembly |
| 10/27/1992 | US5159577 Method of monitoring downhole conditions |
| 10/21/1992 | EP0509908A2 Method and apparatus for determining invasion parameters and using said parameters to plot a more accurate resistivity log on an output record |
| 10/21/1992 | EP0509745A1 Two-part sensor with transformer power coupling and optical signal coupling |
| 10/21/1992 | EP0509408A1 Metal detector with acoustic signal delivery |
| 10/20/1992 | US5157605 Induction logging method and apparatus including means for combining on-phase and quadrature components of signals received at varying frequencies and including use of multiple receiver means associated with a single transmitter |
| 10/20/1992 | US5157331 Enhanced wide aperture groove for antenna of downhole resistivity tool |
| 10/19/1992 | CA2062608A1 Two-part sensor with transformer power coupling and optical signal coupling |
| 10/15/1992 | WO1992017794A1 Method of and apparatus for nqr testing |
| 10/15/1992 | WO1992017793A1 Nqr methods and apparatus |
| 10/15/1992 | WO1992017772A1 Electrode structure of sensor for sensing metallic particles |
| 10/13/1992 | US5155442 Position and orientation locator/monitor |
| 10/07/1992 | EP0315642B1 Conductivity determination in a formation having a cased well |
| 10/06/1992 | US5153525 Vehicle detector with series resonant oscillator drive |
| 10/06/1992 | US5153514 Antenna and wear plates for borehole logging apparatus |
| 10/01/1992 | WO1992016859A1 An electronic measurement apparatus movable in a cased borehole and compensating for casing resistance differences |
| 10/01/1992 | WO1992016720A1 System for measuring excavation position of underground excavator |
| 09/30/1992 | EP0506605A1 Device for detecting magnetisable material in buildings |
| 09/30/1992 | EP0506152A1 Revolving door for the protection of the access to and/or exit from a room |
| 09/30/1992 | EP0505619A1 Device for the detection of the presence and/or determination of the appearance even of small quantities of a magnetic substance |
| 09/30/1992 | EP0505422A1 Position sensor |
| 09/30/1992 | CN1064913A System for logging well during drilling thereof |
| 09/29/1992 | US5151872 Method and apparatus for correcting the output of an onboard vehicle terrestrial magnetism sensor |
| 09/29/1992 | US5151658 Three-dimensional detection system for detecting fractures and their distributions in the earth crust utilizing an artificial magnetic field and magnetic particle tracer |
| 09/29/1992 | US5151657 Underground pipe locating apparatus |
| 09/29/1992 | CA1308167C Magnetic field detector |
| 09/24/1992 | DE4108914A1 Magnetic material, esp., metal detector - optically and/or acoustically displays movement of permanent magnet from rest position |
| 09/22/1992 | US5150056 Method and device for locating the longitudinal axis of a branch pipe from a main pipe |
| 09/22/1992 | US5149962 Detecting position of a ferrous target |
| 09/17/1992 | DE4107816A1 Movement and position detector - determines forces on sphere from deformation of conducting paths on system carrier as sphere rolls over them and from effect of sphere short circuiting paths which are at different potentials |
| 09/16/1992 | EP0503384A1 Three axis magnetometer sensor field alignment and registration |
| 09/16/1992 | EP0503054A1 Apparatus having magnetic field inducing target signal transmitter and position reference transmitter for detecting concealed pipes |
| 09/16/1992 | EP0397655B1 Apparatus and method for electrically prospecting the subsoil |
| 09/15/1992 | WO1992016858A1 Stud finder with level indicator |
| 09/15/1992 | US5148151 Metal detector having target characterization and search classification |
| 09/15/1992 | US5148110 Method and apparatus for passively detecting the depth and location of a spatial or temporal anomaly by monitoring a time varying signal emanating from the earths surface |
| 09/15/1992 | US5148108 Stud finder with level indicator |
| 09/12/1992 | WO1992015900A1 Apparatus and method for detecting buried, elongated, electromagnetic detectable items |
| 09/12/1992 | CA2106000A1 Apparatus and method for detecting buried, elongated, electromagnetic detectable items |
| 09/09/1992 | EP0502757A1 Method for characterizing the texture heterogeneities of geological formations traversed by a borehole |
| 09/09/1992 | EP0332652B1 Method and apparatus for locating leaks in a multiple layer geomembrane |
| 09/08/1992 | US5146167 Method and apparatus for determining the conductivity of subsurface earth formations by filtering and summing in-phase and quadrature conductivity signals with correction values |
| 09/08/1992 | CA1307319C Automated nuclear magnetic resonance analysis of core |
| 09/02/1992 | EP0501676A1 Method of determining the proximity of a structure by means of a form of radiant energy non-interactable with said structure |
| 09/01/1992 | US5144245 Method for evaluating a borehole formation based on a formation resistivity log generated by a wave propagation formation evaluation tool |
| 08/29/1992 | CA2060572A1 System and method for electromagnetically determining both the proximityand dimensions of a non-conductive structure |
| 08/26/1992 | CN1063940A Apparatus for detecting magnetizable material in building structure |
| 08/25/1992 | US5142472 Method of measuring the resistivity and thickness of a thin underground layer using induction logging |
| 08/20/1992 | WO1992014171A1 A surveillance system |
| 08/19/1992 | EP0498865A1 Vehicle security system |
| 08/19/1992 | CN1017939B Fully automatic geomagnetic field component measuring method and apparatus |
| 08/19/1992 | CN1017916B Well logging apparatus and method |
| 08/18/1992 | US5140263 System for determining position of an internal, movable conductive element |
| 08/18/1992 | US5138761 Method of manufacturing magnetic detection apparatus |
| 08/13/1992 | DE4103234A1 Contactless location and identification of electrical leads - applying HF current and modulating its carrier frequency in serial, digital code and selectively tuning to EM field |
| 08/11/1992 | US5138313 Electrically insulative gap sub assembly for tubular goods |
| 08/11/1992 | US5138263 Electromagnetic formation evaluation tool |
| 08/11/1992 | US5138262 Metal detector having detachable battery and speaker housing |
| 08/11/1992 | US5137677 Hall sensor device and method of producing the same |
| 08/06/1992 | WO1992013286A1 Measuring equipment for electrical profiling of a terrain |
| 08/06/1992 | WO1992012670A1 Method of monitoring the position of a sensor |
| 08/05/1992 | EP0497665A1 Method and device for reducing the effects of parasitic noise on the detection of a target, using a system with multiple elementary sensors |
| 08/05/1992 | CN2112163U Engineering geological detector |
| 08/04/1992 | US5136245 Magnetic detection apparatus with sensors mounted on channel or angle cantilever support |
| 08/04/1992 | CA1306049C Geoelectrical method, calibrated on the basis of structural geology,for determining hydraulic values |
| 08/04/1992 | CA1306033C Walk-through metal detector |
| 08/01/1992 | CA2060383A1 Process and apparatus for reducing spurious noise effects in target detection with a system comprising a plurality of simple sensors |
| 07/29/1992 | CN1063139A Apparatus and technique for nmr diffusion measurement |
| 07/28/1992 | US5134379 Capacitive material presence detecting apparatus |
| 07/28/1992 | US5134370 Apparatus for the detection of magnetic tags |
| 07/28/1992 | US5134369 Three axis magnetometer sensor field alignment and registration |
| 07/23/1992 | WO1992012438A1 Magnetic sensor and structure of its mounting |
| 07/22/1992 | EP0495259A1 Device and method for real-time monitoring of accidental damage to the protective covering of underground or immersed metal structures or pipelines |
| 07/21/1992 | US5132624 Method and apparatus for insulating electrical devices in a logging sonde using a fluorinated organic compound |
| 07/21/1992 | US5132623 Method and apparatus for broadband measurement of dielectric properties |
| 07/21/1992 | US5132622 Method and apparatus for locating and retrieving a golf ball having a metal center |
| 07/15/1992 | EP0494764A1 Interrogation station for the identification of objects moved along a conveyor |
| 07/14/1992 | US5130711 Subsurface target identification radar |
| 07/14/1992 | US5130697 Method and apparatus for shaping a magnetic field |
| 07/14/1992 | US5130655 Multiple-coil magnetic field sensor with series-connected main coils and parallel-connected feedback coils |
| 07/14/1992 | CA1305216C Areal method of magnetotelluric exploration |
| 07/09/1992 | WO1992011510A1 Position sensor |
| 07/08/1992 | EP0494130A1 Method and apparatus for electromagnetically detecting the locations of underground conductive bodies |
| 07/08/1992 | EP0493598A1 Apparatus for underground radar tomography |
| 07/08/1992 | EP0493405A1 Electronic markers with predetermined spacing. |
| 07/07/1992 | US5128622 Multi-channel electrostatic sensor apparatus |