Portable station for measuring and adjusting the magnetic signat
Portable transmitter apparatus for inducing alternating current
Portable, buried object detection system with improved signal pr
Position and orientation locator/monitor
Position and orientation locator/monitor
Position and orientation locator/monitor
Position and orientation locator/monitor
Position and orientation locator/monitor
Position and orientation locator/monitor
Positioning, detection and communication system and method
Power frequency magnetic field (PF-MF) detection systems and...
Pre-amplifier and mixer circuitry for a locator antenna
Precision grid survey apparatus and method for the mapping...
Probe carrier for detecting mines or other foreign objects which
Probe for detecting the presence of magnetic material in a groun
Procedure and device for radiating and detecting the...
Procedure and device for the detection of inversions of the eart
Process and device for assessing the permeability of a rock...
Process and device for prospecting a porous geological...
Process for detecting metallic items including a search path def