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Class Information
Number: 324/323
Name: Electricity: measuring and testing > Of geophysical surface or subsurface in situ
Description: Subject matter relating to the determination of an electrical characteristic of the subsurface of the earth in situ.










Sub-classes under this class:

Class Number Class Name Patents
324/330 By aerial survey 61
324/345 By magnetic means 182
324/326 For small object detection or location 567
324/324 Including borehole fluid investigation 77
324/347 Using electrode arrays, circuits, structure, or supports 178
324/344 With radiant energy or nonconductive-type receiver 74
324/332 With radiant energy or nonconductive-type transmitter 48


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8686730 System for streamer electrical resistivity survey and method for analysis of underground structure below a riverbed Apr. 1, 2014
8664586 Super-resolution formation fluid imaging Mar. 4, 2014
8636061 Tool for downhole formation evaluation Jan. 28, 2014
8614578 Attenuation of electromagnetic signals passing through conductive material Dec. 24, 2013
8589079 Method and system for passive electroseismic surveying Nov. 19, 2013
8575938 Electrical power system for towed electromagnetic survey streamers Nov. 5, 2013
8577614 Information characterization system and methods Nov. 5, 2013
8566037 Method and system for passive electroseismic surveying Oct. 22, 2013
8566036 Method and system for passive electroseismic surveying Oct. 22, 2013
8494776 Method and system for passive electroseismic surveying Jul. 23, 2013
8482291 Substrate structure Jul. 9, 2013
8478533 Method and system for passive electroseismic surveying Jul. 2, 2013
8456159 Stabilization system for sensors on moving platforms Jun. 4, 2013
8390294 Multi-resolution borehole resistivity imaging Mar. 5, 2013
8347658 Method and system for passive electroseismic surveying Jan. 8, 2013
8301379 Method of interpolation between a plurality of observed tensors Oct. 30, 2012
8264229 Electromagnetic geological metrology system Sep. 11, 2012
8265913 Electromagnetic surveying Sep. 11, 2012
8253619 Electromagnetic scanning imager Aug. 28, 2012
8230918 Method of characterizing hydrocarbon reservoir fractures in situ with artificially enhanced magnetic anisotropy Jul. 31, 2012
8228066 Instrument for measuring electromagnetic signals Jul. 24, 2012
8174266 Multi-resolution borehole resistivity imaging May. 8, 2012
8138763 Method for quantitative separation of electromagnetic induction and induced polarization effects Mar. 20, 2012
8085050 Robust inversion systems and methods for azimuthally sensitive resistivity logging tools Dec. 27, 2011
8067941 System for streamer electrical resistivity survey and method for analysis of underground structure below a riverbed Nov. 29, 2011
8010291 Processing measurement data that involves computing a derivative of the measurement data that represents a subterranean structure Aug. 30, 2011
7991553 Method and system for removing effects of conductive casings and wellbore and surface heterogeneity in electromagnetic imaging surveys Aug. 2, 2011
7982465 Electromagnetic method on shallow water using a controlled source Jul. 19, 2011
7956794 Short-range radar having a multiple sensor system for determining the location of objects enclosed in a medium Jun. 7, 2011
7948395 Downhole transmission system comprising a coaxial capacitor May. 24, 2011
7890200 Process-related systems and methods Feb. 15, 2011
7860655 Electromagnetically detecting thin resistive bodies in shallow water and terrestrial environments Dec. 28, 2010
RE41829 Nonlinear electroseismic exploration Oct. 19, 2010
7782709 Multi-physics inversion processing to predict pore pressure ahead of the drill bit Aug. 24, 2010
7705599 Buoy-based marine electromagnetic signal acquisition system Apr. 27, 2010
7679546 Apparatus and method of determining location of an object Mar. 16, 2010
7656748 Method of determining impulse responses from a medium in relation to the transmission of waves between different points Feb. 2, 2010
7640110 Pixel based inversion method for surface electromagnetic measurement Dec. 29, 2009
7632349 Silicon wafer surface defect evaluation method Dec. 15, 2009
7620498 Automated borehole image interpretation Nov. 17, 2009
7612566 Method and apparatus for the use of multicomponent induction tool for geosteering and formation resistivity data interpretation in horizontal wells Nov. 3, 2009
7603158 Current density impedance imaging (CDII) Oct. 13, 2009
7567869 Induction tool for detail evaluation of near borehole zone Jul. 28, 2009
7565244 Method and system for removing effects of conductive casings and wellbore and surface heterogeneity in electromagnetic imaging surveys Jul. 21, 2009
7539279 Logarithmic spectrum transmitter waveform for controlled-source electromagnetic surveying May. 26, 2009
7474101 Method for combined transient and frequency domain electromagnetic measurements Jan. 6, 2009
7450053 Logging device with down-hole transceiver for operation in extreme temperatures Nov. 11, 2008
7439977 Method of displaying three-dimensional vector orientations on a two-dimensional surface Oct. 21, 2008
RE40475 Source waveforms for electroseismic exploration Sep. 2, 2008
7411512 Tracking the geographic location of an animal Aug. 12, 2008

1 2 3 4










 
 
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