| 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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| 03/07/1995 | US5396175 Method and apparatus for evaluating formation resistivity using focused annular and azimuthal electrodes |
| 03/02/1995 | WO1995006264A1 Conductor locator adapter for electronic markers |
| 03/01/1995 | EP0640841A1 Apparatus and method for federal reserve note authentication |
| 02/23/1995 | WO1995005612A1 Entropy based signal transmission, reception and signal analysis method and apparatus |
| 02/23/1995 | CA2169832A1 Entropy based signal transmission, reception and signal analysis method and apparatus |
| 02/21/1995 | US5392046 Entropy based signal, transmission, reception and signal analysis method and apparatus |
| 02/14/1995 | US5390109 Sensor for detecting location of metal body |
| 02/14/1995 | US5389881 Well logging method and apparatus involving electromagnetic wave propagation providing variable depth of investigation by combining phase angle and amplitude attenuation |
| 02/14/1995 | US5389877 Nuclear magnetic resonance pulse sequences for determining bound fluid volume |
| 02/14/1995 | US5388448 Conductive particle detector |
| 02/09/1995 | WO1995004291A1 Weight sensitive detection |
| 02/08/1995 | EP0637760A2 Method for the electromagnetic detection of objects |
| 02/08/1995 | CN1027606C Microcomputer controlled multiple-way electrode switching device |
| 02/07/1995 | US5387869 Apparatus for measuring transient electric earth current to predict the occurrence of an earthquake |
| 02/07/1995 | US5387865 Permeability determination from NMR relaxation measurements for fluids in porous media |
| 02/07/1995 | US5387863 Synthetic aperture array dipole moment detector and localizer |
| 02/02/1995 | WO1995003557A1 Method of determining formation resistivity utilizing combined measurements of inductive and galvanic logging instruments |
| 02/02/1995 | WO1995003472A1 Method and apparatus for controlling the head of a drilling or core-drilling device |
| 02/02/1995 | DE4325073A1 Method and arrangement for locating metal parts |
| 02/01/1995 | EP0636906A1 Installation and method for measuring the remanent magnetization of a geologic formation |
| 01/31/1995 | CA2128754A1 Installation and process for measuring the remanent magnetization of geological formations |
| 01/24/1995 | US5384715 System identification and analysis of subsurface radar signals |
| 01/24/1995 | US5384540 Wire presence and identification system |
| 01/24/1995 | US5384535 Electric magnetic detector of magnetic particles in a stream of fluid |
| 01/11/1995 | EP0493405B1 Electronic markers with predetermined spacing |
| 01/11/1995 | EP0425569B1 A system and method for locating an underground probe |
| 01/11/1995 | CN1097234A Wave-guide measuring method for water-holding rate of oil well |
| 01/10/1995 | US5381095 Method of estimating location and orientation of magnetic dipoles using extended Kalman filtering and Schweppe likelihood ratio detection |
| 01/10/1995 | US5381092 Method and apparatus for compressing data produced from a well tool in a wellbore prior to transmitting the compressed data uphole to a surface apparatus |
| 01/05/1995 | WO1995000864A1 Magnetic screen |
| 01/05/1995 | WO1995000863A1 Method and device for sensing and identifying electrical cables |
| 01/05/1995 | WO1995000839A1 Magnetic and transient electromagnetic diffusion inspection method and apparatus |
| 01/05/1995 | WO1995000368A1 Device for detecting the presence of persons on seats |
| 01/05/1995 | CA2165983A1 Device for detecting the presence of persons on seats |
| 01/03/1995 | US5379216 Method and apparatus for producing a new output record medium illustrating a quantitative description in the volume dimension of mud filtrate invasion into permeable zones of a formation in a wellbore |
| 01/03/1995 | US5378993 Liquid sensing circuit |
| 01/02/1995 | CA2125901A1 Determination of fluid transport properties in porous media by nuclear magnetic resonance measurements of fluid flow |
| 12/28/1994 | EP0630485A1 Method and apparatus for downhole measurement of fluid conductivity and hydrocarbon volume during formation testing |
| 12/27/1994 | US5376884 Nuclear magnetic resonance measuring apparatus |
| 12/22/1994 | WO1994029754A1 Electrical logging system |
| 12/22/1994 | WO1994029753A1 A method for identifying faults and unconformities in a geologic formation |
| 12/22/1994 | WO1994029752A1 Method and apparatus for measuring geophysical data |
| 12/22/1994 | WO1994029744A1 System for evaluating the inner medium characteristics of non-metallic materials |
| 12/22/1994 | CA2164726A1 Electrical logging system |
| 12/21/1994 | EP0629982A1 Frequency-dividing transponder including amorphous magnetic alloy and tripole strip of magnetic material |
| 12/21/1994 | EP0629837A1 Method of measuring inner diameter of pipe |
| 12/21/1994 | CN2185902Y Differential excited receiver |
| 12/17/1994 | CA2123864A1 Frequency-dividing transponder including amorphous magnetic alloy and tripole strip of magnetic material |
| 12/14/1994 | EP0628936A1 Multidirectional surveillance marker |
| 12/13/1994 | US5373443 Method for imaging with low frequency electromagnetic fields |
| 12/13/1994 | US5373245 Capaciflector camera |
| 12/13/1994 | US5373235 System and method using portable wall engaging ferromagnetic particle impregnated target medium for electromagnetically measuring distance between oposing walls of a structure |
| 12/13/1994 | US5371959 Pointing device carried by digging arm of excavator, for dynamically indicating location and direction of extension of underground cable |
| 12/08/1994 | WO1994028441A1 Determination of permeability of porous media by streaming potential and electro-osmotic coefficients |
| 12/08/1994 | DE4318563A1 Telescopic support tube for a metal detector (metal detecting device) |
| 12/07/1994 | EP0627106A1 Method and device for electronic identification. |
| 12/06/1994 | US5371496 Two-part sensor with transformer power coupling and optical signal coupling |
| 12/06/1994 | CA1333412C Method of magnetizing well tubulars |
| 11/30/1994 | EP0626666A1 Method for coding remotely detected gauges |
| 11/30/1994 | EP0626595A2 Sensor |
| 11/30/1994 | EP0419637B1 Methods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables |
| 11/24/1994 | WO1994027168A1 Electromagnetic hidden object detector |
| 11/24/1994 | WO1994027158A1 Sensor for articles on an end effector |
| 11/22/1994 | US5367262 Advances in high frequency dielectric logging |
| 11/22/1994 | US5367258 Joint or discontinuity detector for use with pipes and the like |
| 11/22/1994 | US5365652 Method for making a search coil frame assembly for metal detectors |
| 11/17/1994 | EP0624241A1 Method for measuring position and angle. |
| 11/17/1994 | DE4314742A1 Method and arrangement for obtaining highly accurate data from the air |
| 11/15/1994 | US5365163 For an electromagnetic probe |
| 11/15/1994 | CA2073769C Methods, apparatus and devices relating to magnetic markers for elongated hidden objects |
| 11/09/1994 | EP0623237A1 Methods and device for remote sensing of objects |
| 11/09/1994 | EP0623221A1 Method and device for the detection of structural changes in solid bodies. |
| 11/08/1994 | US5363299 Method for identifying faults and unconformities in a geologic formation |
| 11/08/1994 | US5363051 Steering capaciflector sensor |
| 11/08/1994 | US5363041 Determining bound and unbound fluid volumes using nuclear magnetic resonance pulse sequences |
| 11/08/1994 | CA2039989C Electromagnetic sensor element and methods and apparatus for making and using same |
| 11/02/1994 | EP0622766A1 Antenna lattice for electronic article surveillance system |
| 11/02/1994 | EP0622643A1 Induction logging instrument |
| 11/02/1994 | EP0622642A2 An object detecting device |
| 11/02/1994 | EP0622524A1 System for measuring excavation position of underground excavator |
| 11/02/1994 | EP0621954A1 Determination of rock core characteristics |
| 11/01/1994 | US5361239 Compensation method using a single transmitter measurement tool |
| 11/01/1994 | US5361064 Vehicle detector with power main noise compensation |
| 11/01/1994 | US5361029 System for locating multiple concealed underground objects |
| 11/01/1994 | CA1332847C Ground probing radar method and apparatus |
| 10/27/1994 | WO1994024788A1 Ultra-wideband receiver |
| 10/27/1994 | WO1994024584A1 Methods of detecting location of magnetically-marked elongated buried objects |
| 10/26/1994 | EP0621493A1 Dipole moment detection and localization |
| 10/26/1994 | EP0621488A1 A drill-probe for the measurement of the electric resistivity of a soil |
| 10/25/1994 | US5359324 Well logging apparatus for investigating earth formations |
| 10/20/1994 | DE4311822A1 Computer-controlled location system for identifying the danger of avalanches and finding avalanche victims |
| 10/19/1994 | EP0620454A1 Split array dipole moment detection and localization |
| 10/19/1994 | EP0620453A1 Synthetic aperture array dipole moment detector and localizer |
| 10/18/1994 | US5357437 Magnetic marker position fixing system for underwater vehicles |
| 10/18/1994 | US5357253 System and method for earth probing with deep subsurface penetration using low frequency electromagnetic signals |
| 10/18/1994 | US5357202 Plural electrode method for measuring subsurface changes in conductivity as an indication of fluid migration |
| 10/13/1994 | DE4320494C1 Inclination sensor for a vehicle |
| 10/11/1994 | US5355313 Neural network interpretation of aeromagnetic data |
| 10/11/1994 | US5355088 Method and apparatus for determining parameters of a transition zone of a formation traversed by a wellbore and generating a more accurate output record medium |
| 10/05/1994 | EP0618463A1 Method and apparatus for determining formation resistivity in a cased well |