| 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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| 02/23/1983 | EP0072552A2 Detectable element |
| 02/16/1983 | EP0071873A2 Circuit for object detection with a conductive loop |
| 02/09/1983 | EP0071540A2 Method and apparatus for electrically investigating a borehole |
| 02/08/1983 | US4372398 Method of determining the location of a deep-well casing by magnetic field sensing |
| 02/08/1983 | CA1141003A1 Housing for circuitry and loudspeaker of a magnetic locator which shields and resiliently mounts the loudspeaker |
| 02/08/1983 | CA1140993A1 Method and apparatus for the detection of stagnant regions in a fluidized bed or in pneumatic conveying lines |
| 01/25/1983 | CA1140213A1 Subterranean metal pipe and cable locator |
| 01/19/1983 | EP0070126A2 Personnel proximity sensor |
| 01/18/1983 | US4369376 Magnetic gate and method of production thereof |
| 01/11/1983 | US4368428 Method and arrangement for determining the velocity of a vehicle |
| 01/11/1983 | CA1139369A1 Method and apparatus for measuring the resistivity of fluids in a borehole |
| 01/04/1983 | US4367439 Airborne geophysical surveying system using multiple coil pairs |
| 12/29/1982 | EP0067924A2 Method for predicting earthquakes |
| 12/22/1982 | EP0067767A2 Digital induction logging technique |
| 12/21/1982 | US4365197 Identification of pipe material in wells |
| 12/21/1982 | US4365196 Proximity sensing transducer with simulation means |
| 12/21/1982 | US4365191 Method and apparatus for electrical surveys of offshore metal structures with correction for distance |
| 12/21/1982 | CA1138084A1 Electrostatic shield |
| 12/21/1982 | CA1138042A1 Nuclear magnetism logging method and apparatus |
| 12/15/1982 | EP0066959A1 Electrical surveys of underwater of underground structures |
| 12/14/1982 | CA1137552A1 Induction logging |
| 12/07/1982 | US4362992 System and method of detecting the proximity of an alternating magnetic field |
| 11/30/1982 | US4361808 Dielectric constant well logging with current and voltage electrodes |
| 11/30/1982 | CA1136700A1 Method and apparatus for induction logging |
| 11/23/1982 | US4360778 High frequency induction log for locating formation interfaces |
| 11/23/1982 | US4360777 Induction dipmeter apparatus and method |
| 11/23/1982 | US4360359 Analysis of sediments to detect seepage-induced anomalies |
| 11/17/1982 | EP0064621A2 Detection of moving solid or fluid bodies using microwaves |
| 11/17/1982 | EP0064566A1 Metal detector apparatus in crop harvesters |
| 11/16/1982 | US4359687 Method and apparatus for determining shaliness and oil saturations in earth formations using induced polarization in the frequency domain |
| 11/16/1982 | US4359686 Metal detection apparatus with basket |
| 11/09/1982 | US4358749 Object detection |
| 11/09/1982 | US4358423 Method and apparatus for monitoring and controlling the charging operation of an elongated measuring chamber |
| 11/02/1982 | US4357660 Formation dip and azimuth processing technique |
| 10/26/1982 | CA1134441A2 Apparatus and method for determining subsurface formation properties |
| 10/13/1982 | EP0062597A2 Proximity switch |
| 10/13/1982 | EP0062396A2 Aluminium can detector |
| 10/12/1982 | US4354178 Electrodynamic balance for a detection |
| 10/12/1982 | US4354156 Device for detecting ferromagnetic materials |
| 10/05/1982 | CA1133058A1 Electromagnetic geophysical surveying system |
| 09/28/1982 | CA1132659A1 Geophysical bird |
| 09/21/1982 | US4350955 Magnetic resonance apparatus |
| 09/14/1982 | US4349781 Superconducting gradiometer-magnetometer array for magnetotelluric logging |
| 09/14/1982 | CA1131705A1 Geophysical surveying system |
| 09/07/1982 | US4348639 Transmitter-receiver loop buried metal object locator with switch controlled reference voltage |
| 09/07/1982 | US4348635 Detecting and measuring the position of a break in solid formations by measuring the capacitance of an enlongated element embedded therein |
| 08/31/1982 | CA1130862A1 Well logging method and equipment with a dual focusing-electrode system and/or a coil system |
| 08/24/1982 | CA1130411A1 Amorphous antipilferage marker |
| 08/24/1982 | CA1130385A1 Method and means for water bottom logging |
| 08/18/1982 | EP0058076A2 Metal detection apparatus |
| 08/18/1982 | EP0057802A2 Phase and amplitude measurement for a dielectric property logging system |
| 08/17/1982 | US4345208 Anti-falsing and zero nulling search head for a metal detector |
| 08/10/1982 | US4344074 Magnetic field producing apparatus |
| 08/10/1982 | US4344034 Selective/ground neutralizing metal detector |
| 07/28/1982 | EP0056768A2 Method for ground illumination and calculation of E and O of the ground using an electromagnetic pulse, and antenna to carry out this method |
| 07/20/1982 | US4340934 Method of generating subsurface characteristic models |
| 07/20/1982 | US4340405 Apparatus and method for maintaining low temperatures about an object at a remote location |
| 07/13/1982 | US4339720 Telluric noise cancellation in induced polarization prospecting |
| 07/13/1982 | CA1127571A1 Method of magnetic separation of cells and the like, and microspheres for use therein |
| 07/06/1982 | US4338664 Method of evaluating formations traversed by a borehole |
| 07/06/1982 | US4338567 Apparatus and method for determination of bound water in subsurface formations |
| 07/06/1982 | CA1127238A1 Non-polarizing electrode system |
| 07/06/1982 | CA1127237A1 Method and apparatus for determination of subsurface permittivity and conductivity |
| 06/29/1982 | CA1126814A1 Dual focused resistivity logging method and apparatus |
| 06/24/1982 | WO1982002074A1 Device for pressing geophysical devices against the wall of a bore hole |
| 06/15/1982 | US4335353 Method and apparatus for detecting an anomaly in a resistivity measurement of an earth formation |
| 06/08/1982 | US4334192 Metal detector circuit having automatic tuning with multiple rates |
| 06/08/1982 | US4334191 Metal detector circuit having momentary disabled output |
| 06/02/1982 | EP0052933A1 Object detector |
| 05/26/1982 | EP0052145A1 Method and device for prospecting a well during drilling |
| 05/25/1982 | CA1124327A1 Magnetic sensor assembly |
| 05/19/1982 | EP0052053A1 Process and apparatus for airborne surveys of cathodic protection of underground pipelines |
| 05/19/1982 | EP0052052A1 Process and apparatus for geophysical surveys |
| 05/18/1982 | US4330748 Frequency correction circuitry for pipeline sensor apparatus |
| 05/18/1982 | US4330284 Capacitive sensing device |
| 05/11/1982 | US4329647 Method for determining distance and direction from an open well to a cased well using resistivity and directional survey data |
| 05/05/1982 | EP0051018A1 Method and apparatus for electromagnetic borehole logging |
| 04/28/1982 | EP0050603A2 A device for locating a submerged submarine |
| 04/28/1982 | EP0050299A1 Detection method and system, particularly for surveillance installations or automatisms |
| 04/27/1982 | CA1122670A1 Apparatus for detecting the presence of a moving rolled product |
| 04/27/1982 | CA1122669A1 Magnetic detector |
| 04/27/1982 | CA1122654A1 Efficient simultaneous electromagnetic transmission or reception at different frequencies in electromagnetic mapping |
| 04/21/1982 | EP0049949A2 Apparatus for detecting a ferromagnetic material |
| 04/20/1982 | US4326198 Method and apparatus for the promotion of selected harmonic response signals in an article detection system |
| 04/20/1982 | US4326197 Proximity detector |
| 04/20/1982 | US4326129 Evaluation of the interaction with radiant energy of substances traversed by a bore hole |
| 04/14/1982 | EP0049681A1 Method and device for distinguishing between ground fruits on the one hand and stones and clods on the other hand |
| 04/13/1982 | US4325027 Metal detector for locating objects with full sensitivity in the presence of distributed mineral material |
| 04/06/1982 | US4323848 Plural sensor magnetometer arrangement for extended lateral range electrical conductivity logging |
| 04/06/1982 | US4323847 Oscillator type metal detector with switch controlled fixed biasing |
| 04/06/1982 | US4323843 Magnetic contamination detector |
| 04/06/1982 | CA1121457A2 Method and apparatus for measuring in situ density and fabric or soils |
| 03/23/1982 | US4321586 Article theft detection |
| 03/23/1982 | US4321540 Electric prospecting of the subsoil with lineal electrodes |
| 03/23/1982 | US4321539 Digital BFO metal detecting device with improved sensitivity at near-zero beat frequencies |
| 03/23/1982 | CA1120543A1 Apparatus and method for determining characteristics of subsurface formations |
| 03/16/1982 | US4320458 Well log processing technique |
| 03/16/1982 | US4320340 Apparatus for measuring magnetic flux density resulting from galvanic current flow in subsurface casing using a plurality of flux gates |
| 03/09/1982 | US4319192 Deep and/or shallow electrical resistivity investigation suitable for dual resistivity-induction logging |
| 03/09/1982 | US4319191 Dielectric well logging with radially oriented coils |