| 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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| 08/27/1985 | US4538109 Apparatus and method for electromagnetic logging with reduction of spurious modes |
| 08/21/1985 | EP0152192A2 Microwave electromagnetic borehole dipmeter |
| 08/21/1985 | EP0151600A1 Electronic metal detector |
| 08/20/1985 | US4536714 Shields for antennas of borehole logging devices |
| 08/20/1985 | US4536713 Electrical resistivity measurement of a flowing drilling fluid using eddy currents generated therein |
| 08/13/1985 | US4535293 Method for geophysical prospecting using impulsine currents |
| 08/13/1985 | US4535292 Transmitter for an electromagnetic survey system with improved power supply switching system |
| 08/07/1985 | EP0150622A2 Electromagnetic monitoring of elongate conductors, particularly pipes or cables |
| 07/30/1985 | US4532501 Capacitively coupled machine tool safety system |
| 07/23/1985 | US4531204 Computerized truck instrumentation system |
| 07/23/1985 | CA1190918A1 Well logging apparatus and method for making same |
| 07/16/1985 | US4529939 System located in drill string for well logging while drilling |
| 07/16/1985 | US4529938 High frequency induction method for locating the interface between formations having the same resistivity |
| 07/16/1985 | US4529937 Metal detector with spring loaded hinged support |
| 07/16/1985 | CA1190599A1 Method and device for geophysical exploration by means of transient currents |
| 07/16/1985 | CA1190598A1 Resistivity logging system |
| 07/10/1985 | EP0147829A2 Multi-frequency radar for underground investigation |
| 07/09/1985 | US4528508 Nuclear magnetic resonance method and apparatus for remote detection and volumetric measurement of petroleum reserves |
| 07/03/1985 | EP0146580A1 Tactile sensor array |
| 07/02/1985 | US4527153 Detectable element and sensor |
| 07/02/1985 | US4527122 Bore hole direction measuring instrument control |
| 07/02/1985 | US4526177 Electronic anatomical probe |
| 06/25/1985 | CA1189590A1 Apparatus for detecting a ferromagnetic material |
| 06/25/1985 | CA1189569A1 Method and apparatus for single pulse electromagnetic measurements of soil conductivity and dielectric constant |
| 06/18/1985 | US4524325 Dual guard type resistivity measuring apparatus |
| 06/11/1985 | US4523148 Method and apparatus for determining the spontaneous earth potential log from downhole gradient measurements |
| 06/11/1985 | CA1188736A1 Apparatus for the detection of magnetically conductive metals in a moving flow of material |
| 06/11/1985 | CA1188734A1 Method and device for detection of the presence of metal or mineral in a geologic mass |
| 06/04/1985 | CA1188365A1 Electromagnetic logging method and apparatus for improved amplitude and phase measurement |
| 06/04/1985 | CA1188363A1 Method and apparatus for direct aerial prospecting of hydrocarbon reservoirs |
| 05/28/1985 | US4520317 Apparatus including a pair of automatic gain controlled amplifiers for determining the lateral direction to a concealed conductive object |
| 05/23/1985 | WO1985002268A1 Object detector |
| 05/07/1985 | CA1186733A1 Well casing detector system and method |
| 04/30/1985 | US4514809 Dynamic range control of electrode pad current in well logging tools |
| 04/30/1985 | US4514693 Dielectric well logging system with electrostatically shielded coils |
| 04/30/1985 | US4514692 Metal detector and discriminator using differentiation for background signal suppression |
| 04/30/1985 | US4514691 Baggage inspection apparatus and method for determining presences of explosives |
| 04/30/1985 | US4514690 Power line field interference rejection for magnetic sensors |
| 04/23/1985 | US4513376 Phasor processing of induction logs including skin effect correction |
| 04/16/1985 | US4511843 Mandrel apparatus |
| 04/16/1985 | US4511842 Electromagnetic logging device and method with dielectric guiding layer |
| 04/03/1985 | EP0136238A1 Device for measuring the proximity of a metallic conductive surface |
| 04/02/1985 | CA1184974A1 Process and apparatus for airborne surveys of cathodic protection of underground pipelines |
| 03/27/1985 | EP0134804A1 Device in a hydrophone cable for marine seismic surveys |
| 03/26/1985 | US4507613 Method for identifying non-magnetic minerals in earth formations utilizing magnetic susceptibility measurements |
| 03/26/1985 | US4507612 Metal detector systems for identifying targets in mineralized ground |
| 03/26/1985 | US4507611 Method for detecting surface and subsurface anomalies of the earth using vertical current measurements |
| 03/26/1985 | US4506548 Method of locating potential low water cut hydrocarbon reservoirs in high water saturation sands |
| 03/19/1985 | US4506225 Method for remote measurement of anomalous complex variations of a predetermined electrical parameter in a target zone |
| 03/19/1985 | US4505075 Fixturing device |
| 03/12/1985 | US4504833 Synthetic pulse radar system and method |
| 03/12/1985 | CA1183922A1 Electrical surveillance apparatus with moveable antenna elements |
| 03/12/1985 | CA1183896A1 Method and apparatus for electrically investigating a borehole |
| 03/05/1985 | US4503424 Protected sensor for granular materials |
| 03/05/1985 | US4503328 Evaluation of the interaction with radiant energy of substances traversed by a borehole |
| 02/26/1985 | US4502042 Proximity switch, which indicates the presence or absence of field changing objects at a defined distance from the proximity switch by a binary signal with the aid of excitation and detection of a field |
| 02/26/1985 | US4502010 Apparatus including a magnetometer having a pair of U-shaped cores for extended lateral range electrical conductivity logging |
| 02/26/1985 | US4502009 Apparatus adapted for single pulse electromagnetic measurements of soil conductivity and dielectric constant |
| 02/26/1985 | CA1183207A1 Apparatus and method for improved electromagnetic logging in boreholes |
| 02/14/1985 | WO1985000666A1 A search device for localizing subterranean resonant fixpoint markers |
| 02/12/1985 | US4499422 Digital induction logging tool including means for compensating for phase shift errors |
| 02/12/1985 | US4499421 Digital induction logging system including means for generating a plurality of transmitter frequencies |
| 02/12/1985 | CA1182547A1 Earth probing radar system |
| 01/31/1985 | WO1985000428A1 Electronic metal detector |
| 01/29/1985 | CA1181808A1 Transmitter for an electromagnetic survey system |
| 01/16/1985 | EP0131517A2 Arm mechanism supporting a borehole logging shoe |
| 01/16/1985 | EP0131516A2 Method and device for the resistivity logging of geologic formations |
| 01/15/1985 | US4494071 Determination of water saturation in earth formations independent of lithology |
| 01/09/1985 | EP0130940A1 Inductive sensor device and measuring device for using the same |
| 01/08/1985 | US4493039 Apparatus and method for image reproduction of materials using their magnetic and electric properties |
| 01/08/1985 | US4492924 Method and apparatus for ore prospecting utilizing an aerial transmitter and aerial receiver |
| 01/08/1985 | US4492492 Guiding method for cable burying device and a device therefor |
| 01/02/1985 | CA1180383A Method for modifying electron spin resonance signals from hydrocarbon crude |
| 01/01/1985 | US4491841 Self-adjusting inductive object-presence detector |
| 01/01/1985 | US4491796 Borehole fracture detection using magnetic powder |
| 12/19/1984 | EP0128824A1 Process and device for monitoring the position of a slide in the interior of a thick-walled casing |
| 12/19/1984 | EP0128533A2 Inductive proximity switch |
| 12/18/1984 | US4489276 Dual-cone double-helical downhole logging device |
| 12/11/1984 | US4488115 Low battery voltage indicator circuit for a metal detector |
| 12/06/1984 | WO1984004820A1 Tactile sensor array |
| 12/04/1984 | US4486836 Well logging: utilizing superposition of step-profile responses of logging tools to improve logs |
| 12/04/1984 | US4486713 Metal detector apparatus utilizing controlled phase response to reject ground effects and to discriminate between different types of metals |
| 12/04/1984 | US4486712 Frequency dependent pulsed gain modulated metallic object detector |
| 12/04/1984 | US4486090 Copy machine with unauthorized copy prevention |
| 12/04/1984 | CA1179016A1 Portable pulsed nmr instrument and method of use |
| 11/27/1984 | US4485345 Method and apparatus for conducting ground magnetic surveys |
| 11/27/1984 | CA1178660A1 Magnetic field sensing apparatus |
| 11/27/1984 | CA1178658A1 System for permeability logging by measuring streaming potential |
| 11/21/1984 | EP0125741A2 Detector for buried objects |
| 11/20/1984 | US4484278 Well logging: utilizing superposition of step-profile responses of logging tools to improve logs |
| 11/20/1984 | US4484183 Method and system for detection of the presence, removal, or absence of a metal body |
| 11/20/1984 | US4484139 Zoom guard resistivity logging system featuring resistogram profile |
| 11/20/1984 | US4484103 Color selection electron beam guide assembly for flat panel display devices |
| 11/20/1984 | US4483393 Well logging apparatus and method for making same |
| 11/20/1984 | CA1178361A1 Radar drill guidance system |
| 11/13/1984 | US4482959 Well logging: utilizing superposition of step-profile responses of logging tools to improve logs |
| 11/13/1984 | CA1177891A1 Magnetic sensors having misalignment compensating means |
| 11/13/1984 | CA1177887A1 Cockcroft-walton voltage multiplying circuit for slim hole well logging tool |
| 11/07/1984 | EP0124042A2 Electromagnetic detector for metallic materials |
| 11/06/1984 | US4481472 Pulsed induction logging for determining conductivity and invaded zone properties |