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US11 patents
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US9726626B2Aug 8, 2017
Quantum mechanical measurement device
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Optical magnetometers
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US6211807B1Apr 3, 2001
System using spread spectrum modulation for locating underground objects
GEOMETRICS59 citations85
US7723985B2May 25, 2010
Altered sweep bell-bloom magnetometer
GEOMETRICS10 citations84
US6037784AMar 14, 2000
Resistivity measuring apparatus having transmitter and receiver with power level signals
GEOMETRICS13 citations74
US4026078AMay 31, 1977
Spherical structural arrangement
GEOMETRICS20 citations72
US4736299AApr 5, 1988
Reflection seismograph method and apparatus
GEOMETRICS12 citations71
US4646275AFeb 24, 1987
Dynamic range compression for variable area or wiggle trace display method and apparatus
GEOMETRICS2 citations63
US4584560AApr 22, 1986
Floating point digitizer
GEOMETRICS5 citations60
US6351128B1Feb 26, 2002
Tow mechanism for resistivity mapping apparatus
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US6859162B2Feb 22, 2005
Underground object locating system without direction ambiguity
GEOMETRICS1 citations52