electric-field sensors; magnetic-field sensors; electromagnetic sensors; capacitive sensors; transmitters of electric current; magnetic-field transmitters; electronic data recorders; surveying instruments; electric-field sensing systems comprising electric- field sensors or electric potential sensors and computer hardware and software for transmitting or interpreting data sensed; magnetic-field sensing systems comprising magnetic-field sensors and computer hardware and software for transmitti...

surveying; geological surveying; electromagnetic geophysical surveying; oil-field surveying; geophysical exploration for the oil, gas, and mining industries; mapping services featuring geophysical maps; mapping services featuring subsurface resistivity maps; monitoring of subsurface fluids for the oil, gas, and mining industries; electromagnetic tomography for the oil, gas, and mining industries; geophysical data analysis and interpretation for the oil, gas, and mining industries

Electric-field sensors; magnetic-field sensors; electromagnetic sensors; capacitive sensors; transmitters of electric current; magnetic-field transmitters; electronic data recorders; surveying instruments; electric-field sensing systems comprising electric-field sensors or electric potential sensors and computer hardware and software for transmitting or interpreting data sensed; magnetic-field sensing systems comprising magnetic-field sensors and computer hardware and software for transmittin...

surveying; geological surveying; electromagnetic geophysical surveying; oil-field surveying; geophysical exploration for the oil, gas, and mining industries; mapping services featuring geophysical maps; mapping services featuring subsurface resistivity maps; monitoring of subsurface fluids for the oil, gas, and mining industries; electromagnetic tomography for the oil, gas, and mining industries; geophysical data analysis and interpretation for the oil, gas, and mining industries