Utility locators, namely, electromagnetic apparatus for electromagnetically locating hidden or buried utility pipes, conduits, cables, or other electrical conductors; Signal induction devices for inducing current onto utilities or other electrical conductors using magnetic fields comprising of signal generators and magnetic field antennas; utility transmitters for generating current signals for coupling to utilities or other electrical conductors; coupling apparatus for electrically coupling current signals from transmitters to utilities or other electrical conductors
Electrical and Scientific Apparatus