Utility locators for detecting magnetic field signals emitted by utilities or sondes, namely, electromagnetic apparatus used to measure electromagnetic fields from hidden or buried utility pipes, conduits, cables, or other electrical conductors or dipole field signal generators; Signal induction devices for inducing current onto utilities or other electrical conductors using magnetic fields comprising of signal generators and magnetic field antennas; portable battery powered dipole magnetic field signal generators; remotely powered dipole magnetic field signal generators; inductive couplers for magnetically coupling electrical current signals to hidden or buried utility pipes, conduits, cables, or other electrical conductors; downloadable software for controlling magnetic field sonde signal generators; downloadable software for use with utility locators for receiving and processing magnetic field dipole sonde signals; downloadable software for use with utility locators or transmitters for device control or data display
Electrical and Scientific Apparatus