| 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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| 03/31/1994 | WO1994007117A2 Airborne multiband imaging spectrometer |
| 03/30/1994 | EP0588954A1 Apparatus for detecting boundary stratum |
| 03/30/1994 | EP0588933A1 Apparatus for measuring formation resistivity about a borehole |
| 03/30/1994 | EP0588900A1 Method and apparatus for transmitting electromagnetic signals into the earth from a capacitor |
| 03/29/1994 | US5299128 Method and apparatus for delineating bed boundaries in subsurface formations and for producing indications of the angle of dip thereof |
| 03/29/1994 | CA2027871C Method and apparatus for tracking catheters |
| 03/23/1994 | EP0587628A1 Methods and apparatus for nqr testing |
| 03/22/1994 | US5296807 Apparatus for determining location of an element of magnetizable material in a construction structure |
| 03/22/1994 | US5296806 Method for locating metal studs hidden behind a wall partition by use of particulate magnetic material |
| 03/18/1994 | EP0588954A4 Method and apparatus for detecting boundary stratum. |
| 03/17/1994 | WO1994005989A1 Process and device for inspecting and/or servicing and repairing subsidiary canals branching off from a main drain |
| 03/17/1994 | DE4230409A1 Detector of objects with high conductivity using zero or max. coupled system - contains additional coil mechanically coupled to, and operating as, either transmitter or as receiver to suppress primary field effects |
| 03/16/1994 | EP0586583A1 Detection of explosives by nuclear quadrupole resonance |
| 03/09/1994 | EP0586349A1 A device for sensing the thickness of strip material, in particular in devices for changing rolls of metallized strip material automatically |
| 03/09/1994 | EP0585458A1 Device for sensing aircraft |
| 03/08/1994 | US5293128 Method and apparatus for calibrating the output measurement of a logging tool as a function of earth formation parameters |
| 03/03/1994 | WO1994004947A1 Locator for underground pipe |
| 03/03/1994 | WO1994004938A1 Position location system |
| 03/03/1994 | WO1994004932A1 Dual sensitivity stud sensor |
| 03/03/1994 | DE4239224C1 Verfahren und Vorrichtung zur Erfassung von strukturellen Veränderungen in festen Körpern Method and device for the detection of structural changes in solid bodies |
| 03/02/1994 | EP0584224A1 Nuclear magnetic resonance detection of geologic structures |
| 03/01/1994 | US5291137 Processing method and apparatus for processing spin echo in-phase and quadrature amplitudes from a pulsed nuclear magnetism tool and producing new output data to be recorded on an output record |
| 02/22/1994 | US5289124 Permeability determination from NMR relaxation measurements for fluids in porous media |
| 02/22/1994 | US5287740 Method for locating and examining cavities under paved roads |
| 02/16/1994 | EP0582617A1 Methods and apparatus for detecting substances |
| 02/16/1994 | CN2156515Y Horizontal well measurer |
| 02/09/1994 | EP0582137A2 Device for inductive high frequency interrogation of identification carriers |
| 02/08/1994 | US5285154 Saturable core proximity sensor aligned perpendicular to a magnet target having a plate and a non-magnetic metal housing |
| 02/03/1994 | WO1994002870A1 Well logging method and apparatus involving electromagnetic wave propagation providing variable depth of investigation by combining phase angle and amplitude attenuation |
| 02/03/1994 | WO1994002708A1 Device for monitoring collapse of natural ground in underground excavator |
| 02/02/1994 | EP0581686A1 Method and apparatus for probing and inspecting an underground volume |
| 02/02/1994 | EP0581666A2 Pulsed nuclear magnetism tool for formation evaluation while drilling |
| 02/02/1994 | EP0581643A1 Method for dating a geological layer |
| 02/02/1994 | EP0581434A1 Compensation method for an electromagnetic remote position and orientation sensor |
| 02/02/1994 | EP0538255B1 Multiple-quantum nmr with frequency-modulated chirp pulses |
| 02/01/1994 | US5283768 Borehole liquid acoustic wave transducer |
| 02/01/1994 | US5283520 Method of determining thickness of magnetic pipe by measuring the time it takes the pipe to reach magnetic saturation |
| 02/01/1994 | CA1326708C Magnetic system for locating avalanche victims and other lost objects |
| 01/31/1994 | CA2100851A1 Method of dating different levels in a terrestrial geological bed |
| 01/27/1994 | DE4233441A1 Auxiliary device for vehicle with articulated parts or tools for working on electric power lines - has sensor for detecting metal objects or electromagnetic and/or electrostatic fields and evaluation unit connected to alarm and/or actuator |
| 01/26/1994 | EP0580396A2 Metal detector with display |
| 01/25/1994 | US5282229 Method and apparatus for measuring gap between adjoining fuel rods of fuel assembly |
| 01/25/1994 | US5281965 Vehicle detector measurement frame segmentation |
| 01/20/1994 | WO1994001791A1 Method and apparatus for calibrating an mwd electromagnetic logger |
| 01/20/1994 | WO1994001790A1 Detection of an electric or ionic perturbation |
| 01/19/1994 | EP0578686A1 Nqr methods and apparatus |
| 01/19/1994 | EP0578685A1 Method of and apparatus for nqr testing |
| 01/19/1994 | EP0366719B1 Extended range, pulsed induction logging tool and method of use |
| 01/18/1994 | US5280284 Method of determining the electrical properties of the earth by processing electromagnetic signals propagated through the earth from a capacitor |
| 01/18/1994 | US5280243 System for logging a well during the drilling thereof |
| 01/18/1994 | CA1326223C Method for using a small diameter spectral logger in large diameter wells, and means therefor |
| 01/11/1994 | US5278555 Single inductive sensor vehicle detection and speed measurement |
| 01/11/1994 | US5278507 Well logging method and apparatus providing multiple depth of investigation using multiple transmitters and single receiver pair having depth of investigation independent of formation resistivity |
| 01/11/1994 | US5278498 Surface conforming flexible eddy current probe for scanning varying surface contours |
| 01/05/1994 | EP0577015A1 Deactivatable/reactivatable magnetic marker having a step change in magnetic flux |
| 01/04/1994 | US5276396 Planar magnetic harmonic sensor for detecting small quantities of magnetic substances |
| 01/04/1994 | US5276321 Airborne multiband imaging spectrometer |
| 12/29/1993 | EP0576306A1 Magnetic detector |
| 12/29/1993 | EP0575453A1 Apparatus and method for detecting buried, elongated, electromagnetic detectable items |
| 12/29/1993 | EP0575318A1 An electronic measurement apparatus movable in a cased borehole and compensating for casing resistance differences. |
| 12/29/1993 | EP0533765B1 Magnetic detection device for ferromagnetic moored mines |
| 12/28/1993 | US5274392 Tilted antenna |
| 12/23/1993 | WO1993025920A1 Nuclear magnetic resonance determination of petrophysical properties of geologic structures |
| 12/14/1993 | US5270706 Passive aircraft proximity detector for use in highway vehicles |
| 12/14/1993 | US5270649 Method and apparatus for the predication of earthquakes |
| 12/14/1993 | US5270647 Pipe electromagnetic field simulation apparatus using Born's approximation rule |
| 12/14/1993 | US5270644 Magnetometer for use in the in-situ measurement of magnetotactic bacteria in aquatic environments and method of using same for predicting aquatic hypoxia |
| 12/14/1993 | CA1325252C Branched sensor system |
| 12/12/1993 | CA2097461A1 Electromagnetic propagation tool using dipole antennas |
| 12/07/1993 | US5268641 Logging method and apparatus for measuring the Grondingen effect-corrected resistivity of earth formations |
| 12/01/1993 | EP0572309A2 Method and apparatus for electromagnetic logging |
| 11/30/1993 | US5266799 Geophysical survey system |
| 11/30/1993 | US5265477 Detection device for detecting the flow and direction of ground water |
| 11/25/1993 | DE4225800C1 Response device for information transmission system - provides additional energy for coded response signal transmission by energy store in response to interrogation signal |
| 11/25/1993 | DE4216512A1 Textile machinery preventing service unit advance on personnel - comprises automatic service unit stopping or reversing on encounter with person or object utilising capacitive sensor delivering signal |
| 11/23/1993 | US5264832 Parallel conductor chip detector |
| 11/23/1993 | US5264795 System transmitting and receiving digital and analog information for use in locating concealed conductors |
| 11/23/1993 | US5264793 Split array dipole moment detection and localization |
| 11/23/1993 | CA1324635C Long feature vertical of horizontal electrical conductor methodology using phase coherent electromagnetic instrumentation |
| 11/18/1993 | DE4216192A1 Locating corrugation peaks of profiled roof supports - using inductive or capacitive proximity switch separated from roof by distance adjusted for thickness of heat insulating underlayer. |
| 11/16/1993 | US5262885 Control circuit and data transmission device provided with such a circuit |
| 11/10/1993 | EP0568612A1 Measuring equipment for electrical profiling of a terrain. |
| 11/10/1993 | EP0568602A1 Method of monitoring the position of a sensor. |
| 11/09/1993 | US5260662 Conductivity method and apparatus for measuring strata resistivity adjacent a borehole |
| 11/09/1993 | US5260661 Calibrating and compensating influence of casing thickness variations on measurements of low frequency A.C. magnetic fields within cased boreholes to determine properties of geological formations |
| 11/09/1993 | US5260660 Method for calibrating a downhole receiver used in electromagnetic instrumentation for detecting an underground conductor |
| 11/09/1993 | US5260659 Method and apparatus for tracing conductors using an alternating signal having two components related in frequency and phase |
| 11/09/1993 | CA1324202C Null balanced well logging in hydrocarbon contaminated groundwater |
| 11/02/1993 | US5258719 Capacitive coagulation detecting device for mixed phase container |
| 11/02/1993 | US5258709 Method and apparatus for localizing submarines |
| 10/28/1993 | WO1993021589A1 Alternating and static magnetic field gradient measurements for distance and direction determination |
| 10/28/1993 | DE4313390A1 Capacitive detector for vehicle occupants - forms capacitor from ground and seat electrodes and senses failure of electrodes, processor and input signal processor using capacitance of input switching part. |
| 10/27/1993 | EP0566578A1 Method and apparatus for surveying terrain resistivity. |
| 10/14/1993 | DE4212363A1 Electromagnetic metal detector giving audible and visual indications - reinforces acoustic indication of conductive object with null-indicator displays related to nature of buried metal |
| 10/12/1993 | US5252918 Apparatus and method for electromagnetically detecting the passing of a plug released into a well by a bridge circuit |
| 10/07/1993 | DE4210516A1 Controlling items of luggage for transport in aeroplane etc. - using e.g. X=ray radiation testing unit to examine shape and material of objects in luggage and triggering alarm accordingly |
| 10/06/1993 | EP0564164A1 Capacitive proximity sensors |
| 10/05/1993 | US5251286 Method for estimating formation permeability from wireline logs using neural networks |
| 10/05/1993 | CA1322784C Electroseismic prospecting |
| 09/30/1993 | WO1993019388A1 Electromagnetic induction well-logging device |