LandOfFree - US Patents - Listing for Electricity: measuring and testing,Of geophysical surface or subsurface in situ

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

Passive geophysical prospecting apparatus and method based upon

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

Passive geophysical prospecting apparatus and method based upon

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

Passive geophysical prospection system based upon the detection

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

Passive geophysical survey apparatus based upon the detection of

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

Passive geophysical survey method based upon the detection of th

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

Passive ranging techniques in borehole surveying

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

Passive, active and semi-active cancellation of borehole...

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

Permanent apparatus for monitoring a well by injecting...

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

Permanently emplaced electromagnetic system and method for...

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

Phase shift compensation for metal detection apparatus

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

Pipe proximity warning device for accidental damage prevention m

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

Pipeline mapping and interrupter therefor

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

Pipeline mapping and interrupter therefor

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

Plotting of magnetotelluric impedance to determine structure and

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

Plural coil induction device and method for determining in a bor

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

Plural electrode method and means for water bottom logging

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

Plural Frequency method and system for identifying metal objects

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

Plural frequency method and system for identifying metal objects

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

Plural search frequency directional metal detector apparatus hav