| 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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| 04/28/1993 | EP0539118A2 Method of logging while drilling |
| 04/28/1993 | EP0539018A1 Neural network interpretation of aeromagnetic data |
| 04/28/1993 | EP0538255A1 Multiple-quantum nmr with frequency-modulated chirp pulses. |
| 04/27/1993 | US5206640 Surveillance system |
| 04/27/1993 | US5206592 Detection of explosives by nuclear quadrupole resonance |
| 04/27/1993 | US5206065 Methods, apparatus and devices relating to magnetic markers for elongated hidden objects |
| 04/27/1993 | CA1317005C System and method with passive resonant circuit markers for locating buried electrical conductors |
| 04/26/1993 | CA2078293A1 Neural network interpretation of aeromagnetic data |
| 04/22/1993 | DE4235085A1 Coil for inductive sensor or emitter esp. for detecting vessel on cooker hob - composed of high temp. resistant coil e.g. mica and individual high temp. resistant alloy wires e.g. nickel@-chromium@-silicon@ alloy |
| 04/22/1993 | DE4232358A1 Double magnetic coil measuring device for determining shielding effectiveness - has magnetically conducting collars around openings in housing arranged with constant opposing surface separation |
| 04/21/1993 | EP0538037A2 Saturable core proximity sensor including a flux director |
| 04/20/1993 | US5204965 Data processing system using stream stores |
| 04/20/1993 | US5203111 Revolving door for the protection of the access to and/or exit from a room |
| 04/15/1993 | WO1993007514A1 System for real-time look-ahead exploration of hydrocarbon wells |
| 04/15/1993 | DE4133863A1 RF subterranean electrical resistance measuring appts. - has electrical and magnetic field sensors, superheterodyne signal processing and evaluation of amplitude and phases by sample=and=hold system |
| 04/14/1993 | EP0536288A1 Metal detector. |
| 04/08/1993 | DE4232426A1 Circuit for inductive distance measurement of metal part - has oscillator with parallel resonance circuit, inverting amplifier, demodulator and comparator |
| 04/07/1993 | EP0535153A1 An improved system for locating concealed underground objects |
| 04/07/1993 | EP0535071A1 Method for packaging and monitoring products |
| 04/07/1993 | CN1020243C Long feature vertical or horicontal electrical conductor methodology using phase coherent electromagnetic instrumentation |
| 04/06/1993 | US5200705 Dipmeter apparatus and method using transducer array having longitudinally spaced transducers |
| 04/06/1993 | US5200704 System and method including a buried flexible sheet target impregnated with ferromagnetic particles and eddy current probe for determining proximity of a non-conductive underground structure |
| 04/06/1993 | US5200699 Evaluation of liquid-containing samples using nuclear magnetic resonance |
| 04/01/1993 | WO1993006507A1 Method of electric geological exploration |
| 04/01/1993 | WO1993006433A1 Position measurement by radio frequency transponders |
| 03/31/1993 | EP0534730A1 Method for locating and examining cavities under paved roads |
| 03/24/1993 | EP0532604A1 Sub-audio magnetics instrument. |
| 03/24/1993 | EP0288578B1 Method of detecting object and apparatus therefor |
| 03/23/1993 | CA1314993C Process for the location of an object and the determination of its orientation in space and apparatus for performing the same |
| 03/21/1993 | CA2078474A1 Permeability measure from nmr relaxation measurements for fluids in porous media |
| 03/18/1993 | WO1993004628A1 Catheter depth, position and orientation location system |
| 03/18/1993 | CA2116970A1 Catheter depth, position and orientation location system |
| 03/17/1993 | EP0531433A1 Method and system for passive detection of electromagnetic events associated with destructive devices |
| 03/16/1993 | US5194816 Method and apparatus for locating electrical shorts between concealed conductive objects |
| 03/16/1993 | US5194812 Device for determining depth and direction of buried objects |
| 03/09/1993 | US5192953 Pavement structure examination vehicle |
| 03/09/1993 | US5192952 Method and apparatus for transmitting electromagnetic signals into the earth from a capacitor |
| 03/04/1993 | DE4129113A1 Foreign body detector for intake of harvesting machine - has threshold switches in two channels handling signals from metal detector and compression roller position potentiometer |
| 03/03/1993 | EP0530077A1 Geophysical prospecting apparatus |
| 03/02/1993 | US5191290 Logging apparatus for measurement of earth formation resistivity |
| 02/23/1993 | US5189368 Magnetometer |
| 02/23/1993 | US5188426 Method for controlling the thickness of a layer of material in a seam |
| 02/23/1993 | CA1313897C Method for evaluating organic material contents in sedimentary rocks |
| 02/18/1993 | WO1993003403A1 Method and device for electrostatically investigating surface and sub-surface structures |
| 02/18/1993 | CA2114006A1 Method and device for electrostatically investigating surface and sub-surface structures |
| 02/16/1993 | US5187723 Apparatus for detecting metal parts which are movable relative to a metal sensitive sensor arrangement |
| 02/16/1993 | US5187661 Method of determining invaded formation properties including resistivity dielectric constant and zone diameter |
| 02/16/1993 | US5187444 Sensor for sensing the presence of electrolyte solution |
| 02/16/1993 | US5187440 Measuring resistivity changes from within a first cased well to monitor fluids injected into oil bearing geological formations from a second cased well while passing electrical current between the two cased wells |
| 02/10/1993 | EP0527089A2 Method and apparatus for determining horizontal conductivity and vertical conductivity of earth formations |
| 02/09/1993 | US5185578 Method for detecting anomalous geological zones by transmitting electromagnetic energy between spaced drillholes using different frequency ranges |
| 02/03/1993 | EP0417230B1 Vehicle with plastic suspension |
| 02/02/1993 | US5184311 Method of operating an installation that comprises one or more long electrical conductors |
| 02/02/1993 | US5184079 Method and apparatus for correcting data developed from a well tool disposed at a dip angle in a wellbore to eliminate the effects of the dip angle on the data |
| 01/26/1993 | US5182514 Automatic compensator for an airborne magnetic anomaly detector |
| 01/20/1993 | EP0524081A1 Communication system between a emitter/receiver interrogator device and an emitter/receiver responder device |
| 01/20/1993 | EP0523853A1 Vehicle detector with power main noise compensation |
| 01/20/1993 | EP0523852A1 Vehicle detector measurement apparatus and method using frame segmentation |
| 01/20/1993 | EP0523844A1 Single inductive sensor vehicle detection and speed measurement |
| 01/19/1993 | US5180978 Proximity sensor with reduced temperature sensitivity using A.C. and D.C. energy |
| 01/13/1993 | EP0522949A1 Proximity detector |
| 01/13/1993 | EP0522830A1 Vehicle detector with automatic sensitivity adjustment |
| 01/13/1993 | CA2073623A1 Advances in high frequency dielectric logging |
| 01/13/1993 | CA2072900A1 Vehicle detector with automatic sensitivity adjustment |
| 01/12/1993 | US5179346 Conductive particle sensor using a magnet |
| 01/07/1993 | WO1993000597A1 System for multidirectional information transmission between at least two units of a drilling assembly |
| 01/07/1993 | WO1993000039A1 Detecting device for metallic foreign bodies in a living body |
| 01/07/1993 | WO1992021989A3 Methods and apparatus for nqr testing |
| 01/05/1993 | US5177445 Method and apparatus for detecting and locating a selected non-metallic material in a detection region |
| 12/30/1992 | EP0520661A1 Vehicle detector with series resonant oscillator drive |
| 12/30/1992 | EP0520660A1 Zero crossing detection circuit |
| 12/30/1992 | EP0520102A1 Device for location of embedded objects |
| 12/29/1992 | US5175500 Method and apparatus for surveying terrain resistivity utilizing available VFL electromagnetic fields |
| 12/29/1992 | US5175499 Systems and markers using magnetic or spin resonance phenomena |
| 12/29/1992 | CA1312118C Method and apparatus for verifying the presence of ferromagnetic components in an assembly |
| 12/23/1992 | WO1992022834A1 Well logging method and apparatus providing multiple depth of investigation using multiple transmitters and single receiver pair |
| 12/23/1992 | WO1992022833A1 Method and apparatus for detecting boundary stratum |
| 12/23/1992 | WO1992022824A1 Method and apparatus for transmitting electromagnetic signals into the earth from a capacitor |
| 12/22/1992 | US5173658 Inductive proximity sensor with force transferring support post for use in high pressure environments |
| 12/22/1992 | US5173139 Method for providing magnetic markers on elongated hidden objects |
| 12/18/1992 | CA2071331A1 Single inductive sensor vehicle detection and speed measurement |
| 12/18/1992 | CA2069525A1 Vehicle detector with power main noise compensation |
| 12/18/1992 | CA2069231A1 Vehicle detector measurement frame segmentation |
| 12/18/1992 | CA2069168A1 Zero crossing detection circuit |
| 12/18/1992 | CA2068896A1 Vehicle detector with series resonant oscillator drive |
| 12/15/1992 | US5172055 Hidden metal edge mapper utilizing eddy current analyzer and spring biased marker |
| 12/10/1992 | WO1992021989A2 Methods and apparatus for nqr testing |
| 12/10/1992 | WO1992021987A1 Detection of explosives by nuclear quadrupole resonance |
| 12/10/1992 | CA2110580A1 Methods and apparatus for nqr testing |
| 12/09/1992 | EP0517530A2 Coagulation detecting device for mixed phase container |
| 12/09/1992 | EP0517481A2 Detection of magnetic field changes |
| 12/08/1992 | US5168942 For measuring earth formation while drilling in an earth formation |
| 12/02/1992 | EP0516525A1 Slot antenna having two nonparallel elements |
| 12/01/1992 | US5168234 Method and apparatus for measuring azimuthal as well as longitudinal waves in a formation traversed by a borehole |
| 12/01/1992 | US5168224 Detecting method and apparatus of specific substance |
| 11/26/1992 | WO1992021045A1 Nuclear magnetic resonance detection of geologic structures |
| 11/26/1992 | CA2119785A1 Nuclear magnetic resonance detection of geologic structures |
| 11/25/1992 | EP0515266A1 Proximity detector for aerial power lines |
| 11/25/1992 | EP0515187A2 Method and apparatus for sensing proximity of an object using near-field effects |
| 11/25/1992 | CN1066510A Geophysical prospecting |