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Electromagnetic logging apparatus using vertical magnetic dipole

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic logging apparatus with button antennas for measu

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic logging apparatus with slot antennas

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic logging device and method with dielectric guidin

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic logging method and apparatus with scanned magnet

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic logging sonde having improved housing

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic logging with reduction of spurious transverse ma

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic method and apparatus for determining the...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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Electromagnetic method and apparatus for determining the...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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Electromagnetic method on shallow water using a controlled...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Reexamination Certificate

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Electromagnetic methods and apparatus for determining the...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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Electromagnetic methods and apparatus for determining the...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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Electromagnetic pipe mapper for accurate location and depth dete

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location
Patent

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Electromagnetic propagation thin bed resistivity well logging sy

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic resistivity logging instrument with...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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Electromagnetic shield for an inductive search coil assembly

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location
Patent

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Electromagnetic source integrated into an element of a well casi

Electricity: measuring and testing – Of geophysical surface or subsurface in situ
Patent

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Electromagnetic subsoil prospecting process using an asymptotic

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent

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Electromagnetic survey system with multiple sources

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location
Reexamination Certificate

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Electromagnetic surveying for hydrocarbon reservoirs

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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