| 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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| 02/14/1984 | US4431963 Apparatus for determining a natural current flow in well casing |
| 02/14/1984 | US4431005 Method of and apparatus for determining very accurately the position of a device inside biological tissue |
| 02/07/1984 | US4430653 Earth probing radar system |
| 02/07/1984 | US4430613 Pipeline inspection and maintenance method including moving a magnetic field responsive device along the route of the pipeline |
| 02/07/1984 | CA1161901A1 Induced polarization logging |
| 02/07/1984 | CA1161900A1 Method and apparatus for determining the electrical conductivity of the ground |
| 02/02/1984 | WO1984000423A1 A method and apparatus for determining the trace and depth of underground metallic conductors |
| 01/31/1984 | US4428405 Electronic control device on a gripper shuttle weaving machine |
| 01/31/1984 | CA1161517A1 Intrusion warning system |
| 01/24/1984 | US4427944 System for permeability logging by measuring streaming potentials |
| 01/24/1984 | US4427943 Apparatus and method for locating and tracking magnetic objects or sources |
| 01/24/1984 | US4427942 Concealed electrical conductor detecting system |
| 01/24/1984 | US4427941 Temperature compensated well logging tool |
| 01/24/1984 | CA1161113A1 Geophysical surveying method |
| 01/24/1984 | CA1161112A1 Method and apparatus for electromagnetic dipmeter |
| 01/10/1984 | CA1160292A1 Method and apparatus for indicating well casing corrosion |
| 01/10/1984 | CA1160290A1 Metal type detector |
| 01/10/1984 | CA1160285A1 Logging sonde housing and manufacturing method |
| 01/04/1984 | EP0097401A1 Apparatus for determining the position of a metal body in an electrical low conductivity medium |
| 01/03/1984 | US4424187 Graphite-sheathed spheroidal nuclear fuel or breeder particles |
| 12/27/1983 | US4423377 Compact metal detector of the balanced induction type |
| 12/27/1983 | CA1159565A1 Sheet articles of non-conductive material marked for identification purposes, and method and apparatus for identifying such articles |
| 12/21/1983 | EP0096568A1 Metal detection system |
| 12/21/1983 | EP0096380A2 Method of locating underground ferromagnetic objects |
| 12/20/1983 | US4422043 Electromagnetic wave logging dipmeter |
| 12/20/1983 | US4421981 Method and apparatus for conducting remote surveys of the earth's crust |
| 11/22/1983 | US4417210 Method of geophysical prospection using transient currents |
| 11/22/1983 | US4416289 Circuits for determining very accurately the position of a device inside biological tissue |
| 11/15/1983 | US4415857 Non-polarizing electrode system for geophysical prospecting and the like |
| 11/15/1983 | CA1157096A1 Systems and method for identifying objects having conductive properties |
| 11/15/1983 | CA1157094A1 Telluric noise cancellation in induced polarization prospecting |
| 11/09/1983 | EP0093546A2 Displacement sensitive transducers |
| 11/09/1983 | EP0093545A2 Displacement sensitive transducers |
| 11/09/1983 | EP0093261A1 Improved well logging method and apparatus |
| 11/09/1983 | EP0093260A1 Method and apparatus for dynamic range control |
| 11/08/1983 | US4414656 Well logging system for mapping structural and sedimentary dips of underground earth formations |
| 11/08/1983 | US4414511 Low resistance, fluid replenishing, reference cell and method for using same in structure-to-soil electrical surveys |
| 11/08/1983 | US4413512 Method of locating potential low water cut hydrocarbon reservoirs |
| 11/08/1983 | CA1156720A1 Metal detector |
| 11/01/1983 | US4413232 Method for detecting metal objects in a non-metal container by rotating the container through a plane of detection |
| 10/25/1983 | US4412207 Digital induction logging tool including a floating point A/D |
| 10/25/1983 | US4412180 Method and device with adjustable focusing for measuring the electric resistivity of geological formations |
| 10/25/1983 | US4412179 Computer-controlled, portable pulsed NMR instrument and method of use wherein the times of RF interrogation are distributed over at least a cycle at the nuclear magnetization precessional frequency |
| 10/25/1983 | US4412178 Computer-controlled, portable pulsed NMR instrument and method of use wherein a DC magnetic field gradient is artificially introduced |
| 10/25/1983 | US4412177 Eddy current inspection tool which is selectively operable in a discontinuity detection mode and a discontinuity magnitude mode |
| 10/18/1983 | US4410052 Method of drilling a productive bed |
| 10/12/1983 | EP0091270A2 Resistivity logging system |
| 10/12/1983 | EP0091034A2 Arrangement for the detection of metallic objects in a flow of material |
| 10/11/1983 | US4409551 Telluric survey electrode |
| 10/11/1983 | CA1155195A1 Proximity sensing system and inductance measuring technique |
| 10/11/1983 | CA1155178A1 Detecting and measuring the position of a break in solid formations |
| 10/05/1983 | EP0090689A1 Method and device for detecting a magnetic piece in a defined proximity zone |
| 10/05/1983 | EP0090482A1 Apparatus for measuring defects in insulation coatings |
| 10/05/1983 | EP0090021A1 A marker for subterrenean marking and a novel application for such a marker. |
| 10/04/1983 | US4408161 Computer-controlled, portable spin echo NMR instrument and method of use |
| 10/04/1983 | US4408159 Proximity sensing head |
| 10/04/1983 | US4408156 Sheet articles of non-conductive material marked for identification purposes, and method and apparatus for identifying such articles |
| 10/04/1983 | CA1154826A1 Apparatus for providing in phase polarization in a proton magnetometer |
| 09/20/1983 | US4405926 Methods and apparatus for warning aircraft of the presence and direction of electrical transmission lines |
| 09/06/1983 | US4403146 Evaluation of the interaction with radiant energy of substances traversed by a bore hole |
| 08/31/1983 | EP0087271A2 Electromagnetic geophysical surveying apparatus and system |
| 08/31/1983 | EP0087168A2 A method and a set of devices for remote location of buried persons |
| 08/30/1983 | US4401947 Small hole well logging sonde and system with transmitter and receiver assemblies |
| 08/30/1983 | US4401944 Displacement detector having first and second magnetoresistive elements with a bias field at 45° to each element |
| 08/09/1983 | US4398272 Computerized truck instrumentation system |
| 08/09/1983 | US4398151 Method for correcting an electrical log for the presence of shale in a formation |
| 07/21/1983 | WO1983002501A1 A system for localizing laid cables or pipes |
| 07/20/1983 | EP0084001A2 Induction logging technique |
| 07/19/1983 | US4394645 Electrical surveillance apparatus with moveable antenna elements |
| 07/19/1983 | US4394190 Magnetically permeable metal piece, semiconductor chip, integrated circuit |
| 07/19/1983 | CA1150078A1 Method and arrangement for determining the velocity of a vehicle |
| 07/12/1983 | US4393350 Method for rapidly detecting subterranean tunnels by detecting a non-null value of a resultant horizontal magnetic field component |
| 07/05/1983 | US4392109 Static correction for magnetotelluric data |
| 06/29/1983 | EP0082779A1 Device for measuring the distance between two points in a solid |
| 06/28/1983 | US4390836 Method and apparatus for the detection of pipeline holidays |
| 06/21/1983 | US4389613 Computer-controlled, portable pulsed NMR instrument and method of use |
| 06/21/1983 | US4388890 Device for locating in buildings the exact position of hidden objects |
| 06/21/1983 | CA1148635A1 Proximity detector |
| 06/14/1983 | US4388594 Semi-permeable electrolytic cell and method for surveying buried structures |
| 06/14/1983 | CA1148217A1 Dielectric constant well logging |
| 06/08/1983 | EP0080927A2 Receiver for a terrestrial environment probe |
| 06/07/1983 | US4387340 Apparatus for determining the distance to a concealed conductive object which is radiating an alternating current signal |
| 05/31/1983 | US4385516 System for the detection of the presence of a predetermined chemical vapor distributed in the atmosphere |
| 05/31/1983 | CA1147153A1 Apparatus and method for maintaining low temperatures about an object at a remote location |
| 05/18/1983 | EP0079287A1 Device for measuring the electric characteristic of the first subsoil layers |
| 05/10/1983 | US4383220 Microwave electromagnetic borehole dipmeter |
| 05/10/1983 | US4383218 Eddy current flow detection including compensation for system variables such as lift-off |
| 05/10/1983 | CA1146220A1 Electromagnetic sensing device |
| 05/03/1983 | US4382252 Intrusion warning system |
| 04/27/1983 | EP0077605A2 Cue ball detection and separation assembly |
| 04/26/1983 | US4381544 Process and apparatus for geotechnic exploration |
| 04/19/1983 | US4380734 Measuring magnetic intensity independent of speed in a succession of moving magnetic strips |
| 04/14/1983 | WO1983001336A1 Well logging apparatus and method for making same |
| 04/14/1983 | WO1983001306A1 A marker for subterrenean marking and a novel application for such a marker |
| 03/30/1983 | EP0075399A2 Fixing of a geographical reference of a vehicle travelling through a pipeline |
| 03/30/1983 | EP0075199A1 Method of and apparatus for locating avalanche victims |
| 03/29/1983 | US4378464 Cable for prospecting |
| 03/29/1983 | CA1143791A1 Hydrocarbon prospecting method and apparatus for the indirect detection of hydrocarbon reservoirs |
| 03/16/1983 | EP0074317A2 Logging method and apparatus using a probe equipped with measuring pads |
| 03/15/1983 | CA1143009A1 Probe for the measurement of magnetic susceptibility |