Magnetic detection apparatus with sensors mounted on channel or

Magnetic exploration with reduction of magnetic data to the equa

Magnetic field method and apparatus for evaluating in situ and/o

Magnetic probe exploration device for determining residual fossi

Magnetic ranging and controlled earth borehole drilling

Magnetic survey technique for determining subsurface environment

Magnetization of target well casing string tubulars for...

Magnetization of target well casing strings tubulars for...

Magnetometer circuitry for use in bore hole detection of AC magn

Magnetometer with waveform shaping

Matching amplifier having an extremely high input resistance for

Measurement of vector components of static field perturbations f

Measuring equipment and method for mapping the geology in an...

Method and apparatus for conducting ground magnetic surveys

Method and apparatus for detecting rock movement

Method and apparatus for detecting the direction and distance to

Method and apparatus for determining distance for magnetic and e

Method and apparatus for determining the azimuth of a borehole b

Method and apparatus for determining the direction to a metal-ca

Method and apparatus for exploration using GMR sensors