| 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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| 10/05/1994 | EP0618458A2 Nuclear magnetic resonance measuring apparatus |
| 10/05/1994 | EP0386134B1 Antenna system for magnetic and resonant circuit detection |
| 10/04/1994 | US5352974 Stud sensor with digital averager and dual sensitivity |
| 09/29/1994 | WO1994022114A1 A capacitive verification device for a security thread embedded within currency paper |
| 09/29/1994 | DE4309599A1 Method and device for detecting an inaminate object having dynamic properties in the ground |
| 09/29/1994 | DE3831952A1 Arrangement in a torpedo search head |
| 09/27/1994 | US5351004 Saturable core proximity sensor including a flux director and a magnetic target element |
| 09/21/1994 | EP0371990B1 Systems and methods for sensing position and movement |
| 09/20/1994 | US5349528 Method apparatus for determination of porosity lithological composition |
| 09/15/1994 | WO1994020941A1 Multi-mode identification system |
| 09/15/1994 | WO1994020864A1 Method of determining the electrical properties of the earth by processing electromagnetic signals propagated through the earth from a capacitor |
| 09/15/1994 | DE4307366A1 Adapting device |
| 09/14/1994 | EP0615217A1 Electronic article surveillance system with enhanced geometric arrangement |
| 09/14/1994 | EP0615140A2 Method and apparatus for locating a line |
| 09/14/1994 | EP0614538A1 Nuclear magnetic resonance detection of geologic structures |
| 09/12/1994 | CA2118736A1 Permeability determination from nmr relaxation measurements for fluids in porous media |
| 09/07/1994 | EP0614095A2 Improvements to dipole detection and localization processing |
| 09/07/1994 | EP0560893A4 System for logging a well during the drilling thereof |
| 09/06/1994 | US5345471 Ultra-wideband receiver |
| 09/06/1994 | US5345179 Logging earth formations with electromagnetic energy to determine conductivity and permittivity |
| 09/06/1994 | US5343676 Device for recognizing ferromagnetic foreign bodies, in particular in respect of harvesting machines |
| 09/01/1994 | WO1994019708A1 Location of buried conductors |
| 09/01/1994 | DE4313773C1 Method for monitoring a region by means of measuring external potential |
| 08/31/1994 | EP0613027A1 Method and apparatus for the detection of predetermined materials in the ground |
| 08/31/1994 | EP0613026A1 Object detection device |
| 08/30/1994 | US5343153 Well logging method and apparatus using passive azimuthal electrodes |
| 08/30/1994 | US5343152 Electromagnetic homing system using MWD and current having a funamental wave component and an even harmonic wave component being injected at a target well |
| 08/24/1994 | EP0611970A1 Multiple aerial for metal detector |
| 08/23/1994 | US5341101 Method and apparatus utilizing ionizing and microwave radiation for saturation determination of water, oil and a gas in a core sample |
| 08/23/1994 | US5341100 Electromagnetic wave method and apparatus for downhole measurement of fluid conductivity and hydrocarbon volume during formation testing |
| 08/17/1994 | EP0611164A1 Method and system for detecting a marker |
| 08/17/1994 | CN1090936A Distributed microcomputer-controlled multichannel electrode switching device |
| 08/16/1994 | US5339037 Apparatus and method for determining the resistivity of earth formations |
| 08/16/1994 | US5339036 Logging while drilling apparatus with blade mounted electrode for determining resistivity of surrounding formation |
| 08/16/1994 | US5339023 Nondestructive testing apparatus for determining the orientation of reinforcing bars within a concrete structure |
| 08/10/1994 | EP0610024A1 Dielectric optical fiber cables which are magnetically locatable |
| 08/10/1994 | EP0451209B1 Arrangement for detecting metallic particles carried by a fluid |
| 08/09/1994 | US5337353 Capacitive proximity sensors |
| 08/09/1994 | US5337259 Dipole detection and localization processing |
| 08/09/1994 | US5337002 Locator device for continuously locating a dipole magnetic field transmitter and its method of operation |
| 08/09/1994 | US5336997 Non-symmetrical inductive sensors having ferrite coil geometries with different top and base geometries |
| 08/04/1994 | WO1994017429A1 Apparatus for locating buried conductors |
| 08/04/1994 | WO1994017281A1 Method for determining changes in well bore morphology |
| 08/04/1994 | CA2154674A1 Method of determining changes in well bore morphology |
| 08/02/1994 | US5334932 Temperature compensated electrical sensor system for measuring ferrous particles in a fluid using a series resonant oscillator and microprocessor |
| 08/02/1994 | US5334831 Proximity detector for detecting position of a target |
| 07/28/1994 | DE4301611A1 Device for recognising foreign bodies in a harvesting machine |
| 07/27/1994 | EP0607605A1 Annular sonde for a metal detector |
| 07/26/1994 | US5332967 Well logging tool for bore hole investigations |
| 07/20/1994 | EP0606253A1 Catheter depth, position and orientation location system |
| 07/19/1994 | US5331331 Electromagnetic propagation tool using dipole antennas |
| 07/12/1994 | US5329448 Method and apparatus for determining horizontal conductivity and vertical conductivity of earth formations |
| 07/12/1994 | US5329235 Method for processing signals from an MWD electromagnetic resistivity logging tool |
| 07/07/1994 | WO1994015229A1 Method and apparatus for downhole measurement of fluid conductivity and hydrocarbon volume during formation testing |
| 07/07/1994 | WO1994007117A3 Airborne multiband imaging spectrometer |
| 07/07/1994 | CA2117478A1 Method and apparatus for downhole measurement of fluid conductivity and hydrocarbon volume during formation testing |
| 07/05/1994 | US5327089 Portable assembly for supporting magnetic and electrical sensors |
| 07/05/1994 | US5327086 Multiple-quantum NMR with frequency-modulated chirp pulses |
| 07/05/1994 | US5325918 Optimal joule heating of the subsurface |
| 06/23/1994 | WO1994014087A1 Device and method for measuring the conductivity of geological formations adjacent a well |
| 06/23/1994 | CA2130094A1 Method and mean for measuring the conductivity of geological formations around a well |
| 06/22/1994 | EP0603020A1 Apparatus and method for the characterisation of a medium which contains at least one conductive part |
| 06/21/1994 | US5323114 Method and apparatus for obtaining sectional information of the underground by measuring time differences and strength of electromagnetic signals |
| 06/16/1994 | DE4341890A1 Magnetic arrangement for detection of object movement - has premagnetising magnet with hollow part with holder for magnetoresistive element |
| 06/16/1994 | DE4241484A1 Geopotential measurement for locating impurities in ground or in water - involves measuring conductivity in ground or water caused by galvano-chemical potential of impurities |
| 06/16/1994 | CA2111508A1 Device and method for characterizing a medium composed of at least one conduction part |
| 06/15/1994 | EP0601664A1 Measuring device for underground probing, and method for the application thereof |
| 06/14/1994 | US5321361 Apparatus and method for detecting magnetically detectable plastic pipe and other sources of magnetic fields from a distance using a vertically aligned gradiometer on a horizontal support |
| 06/09/1994 | WO1994012895A1 Method and device for the detection of structural changes in solid bodies |
| 06/09/1994 | WO1994012890A1 Magnetic measurement station for naval vessels |
| 06/01/1994 | CN2167185Y Water-proof sealing structure for survey of well |
| 05/26/1994 | WO1994011762A1 Movable solenoid source in target well for location measurement |
| 05/26/1994 | DE4338435A1 Detector for metallic objects in passages open to armed persons - has additional reception winding on each side of entrance to protected area for distinguishing between two objects |
| 05/26/1994 | DE4238992A1 Non-contact detection of proximity of body using electrode - using oscillator which is influenced by changing capacitance difference between one electrode and its surroundings and second electrode and its surroundings |
| 05/24/1994 | US5315243 Detection and discrimination between ferromagnetic and non-ferromagnetic conductive particles in a fluid |
| 05/18/1994 | EP0596878A1 Method and device for electrostatically investigating surface and sub-surface structures |
| 05/17/1994 | US5313192 Marker for use in an article surveillance system |
| 05/11/1994 | EP0409882B1 Detector |
| 05/11/1994 | DE4240921C1 Metal detector for locating hidden weapons - compares signals using reception windings at different heights, to correct non-linearity |
| 05/05/1994 | DE4333121A1 Locating system with magnetometer for magnetic objects in ground - contains magnetic probe movable along a line, and corrects for speed variations |
| 05/05/1994 | DE4234559A1 Search antenna for locating buried mines - contains monopole or dipole of metal rods with damping resistances or of high impedance, weakly conducting plastics material elements contg. graphite or carbon@ |
| 05/05/1994 | DE4232784C1 Detection and tracking of metal particles in a moving fabric web - has angled detection lines over fabric width to register particle location through time and path gap measurement |
| 05/04/1994 | EP0595028A2 Method for monitoring an area |
| 05/04/1994 | EP0457788B1 Process and device for monitoring the occurrence or spreading of fractures or cracks in materials, workpieces, component parts, structures or flying objects, in particular in earthquake-prone regions or movement of strata during tunnelling |
| 05/03/1994 | US5309098 Nuclear magnetic resonance detection of geologic structures |
| 04/27/1994 | CA2108067A1 Method for monitoring an area |
| 04/26/1994 | US5307272 Minefield reconnaissance and detector system |
| 04/26/1994 | US5307072 Non-concentricity compensation in position and orientation measurement systems |
| 04/26/1994 | US5307042 Search coil frame assembly for metal and method for making same |
| 04/19/1994 | US5305410 Dielectric optical fiber cables which are magnetically locatable |
| 04/19/1994 | US5305212 Alternating and static magnetic field gradient measurements for distance and direction determination |
| 04/19/1994 | US5304983 Multiple pulse responder and detection system and method of making and using same |
| 04/19/1994 | US5304927 Method and apparatus for monitoring a series of products |
| 04/14/1994 | WO1994008257A1 Circuit tracer |
| 04/13/1994 | EP0490921B1 Metal detecting system |
| 04/12/1994 | US5302895 Joint or discontinuity detector for use with pipes and the like |
| 04/06/1994 | EP0590795A2 Apparatus for supporting magnetic and electrical sensors |
| 04/06/1994 | EP0590349A2 Magnetometer probe |
| 04/06/1994 | EP0590179A1 Magnet position detector |
| 03/31/1994 | WO1994007157A1 Method and apparatus for passively detecting the depth and location of a spatial or temporal anomaly |