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Class Information
Number: 324/331
Name: Electricity: measuring and testing > Of geophysical surface or subsurface in situ > By aerial survey > For magnetic field detection
Description: Subject matter having means for detecting a component of the earth"s magnetic field.

Patents under this class:

Patent Number Title Of Patent Date Issued
8674701 Airborne electromagnetic transmitter coil system Mar. 18, 2014
8614578 Attenuation of electromagnetic signals passing through conductive material Dec. 24, 2013
8456159 Stabilization system for sensors on moving platforms Jun. 4, 2013
8400157 Bucking coil and B-field measurement system and apparatus for time domain electromagnetic measurements Mar. 19, 2013
8278928 Apparatus and method for detection of position of a component in an earth formation Oct. 2, 2012
8174266 Multi-resolution borehole resistivity imaging May. 8, 2012
8169222 Method for electroseismic survey design May. 1, 2012
8058864 Circuits and methods for providing a magnetic field sensor with an adaptable threshold Nov. 15, 2011
7980327 Sub-surface imaging using antenna array for determing optimal oil drilling site Jul. 19, 2011
7948237 Large airborne time-domain electromagnetic transmitter coil system and apparatus May. 24, 2011
7701337 Hybrid-technology metal detector Apr. 20, 2010
7681831 Suspension net for airborne surveying Mar. 23, 2010
7646201 Airborne electromagnetic (EM) survey system Jan. 12, 2010
7640110 Pixel based inversion method for surface electromagnetic measurement Dec. 29, 2009
7432715 Method and apparatus for metal detection employing digital signal processing Oct. 7, 2008
7397417 Electromagnetic impulse survey apparatus and method utilizing a magnetic component electromagnetic antenna Jul. 8, 2008
7397111 Semiconductor wafer, an electronic component, and a component carrier for producing the electronic component Jul. 8, 2008
7375529 Induction magnetometer May. 20, 2008
7365544 Methods of adjusting airborne geophysical measurements based on mapping instrument measurements Apr. 29, 2008
7266406 Magnetic resonance apparatus Sep. 4, 2007
7262601 Aircraft equipped for airborne vector magnetic exploration surveys Aug. 28, 2007
7031839 Multi-frequency focusing for MWD resistivity tools Apr. 18, 2006
7013745 Unattended ground sensor assembly Mar. 21, 2006
6954698 System and method for surveying underground density distributions Oct. 11, 2005
6876202 System, method and computer product geological surveying utilizing natural electromagnetic fields Apr. 5, 2005
6870370 Electromagnetic induction detection system Mar. 22, 2005
6845936 Stable heli-borne vector platform for performing geophysical measurements Jan. 25, 2005
6765383 Magnetotelluric geophysical survey system using an airborne survey bird Jul. 20, 2004
6718278 Location system Apr. 6, 2004
6707301 External magnetic field measuring method, static magnetic field correcting method, external magnetic field measuring apparatus, and MRI system Mar. 16, 2004
6546344 Magnetic anomaly sensor system Apr. 8, 2003
6483309 Power frequency magnetic field (PF-MF) detection systems and operating methods therefor Nov. 19, 2002
6369573 Apparatus for reducing rotation of a towed airborne article Apr. 9, 2002
6311128 Combined navigation and mobile communication satellite architecture Oct. 30, 2001
6255825 Method and apparatus for detecting, locating and resolving buried pipelines, cased wells and other ferrous objects Jul. 3, 2001
6244534 Airborne electromagnetic system Jun. 12, 2001
4904940 Fiber-optic multicomponent magnetic field gradiometer for first, second and higher order derivatives Feb. 27, 1990
4814711 Survey system and method for real time collection and processing of geophysicals data using signals from a global positioning satellite network Mar. 21, 1989
4686474 Survey system for collection and real time processing of geophysical data Aug. 11, 1987
4590425 Magnetic detector apparatus with excitation conductors connected in series via sensor housing May. 20, 1986
4570122 Magnetic exploration with reduction of magnetic data to the equator Feb. 11, 1986
4539522 Magnetic detector apparatus with liquid-supported, conductive, sensor-support tube Sep. 3, 1985
4435981 Airborne gravity surveying Mar. 13, 1984
4309659 Method for detecting a magnetic source by measuring the magnetic field thereabout Jan. 5, 1982
4228395 Feature recognition system Oct. 14, 1980
3976937 Method and apparatus for recording position of sensor in airborne magnetic surveying Aug. 24, 1976

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