Assignee
VECTOR MAGNETICS
US4 patents
Top patents by PatentIndex Score
US5343152AAug 30, 1994
Electromagnetic homing system using MWD and current having a funamental wave component and an even harmonic wave component being injected at a target well
VECTOR MAGNETICS182 citations99
US5218301AJun 8, 1993
Method and apparatus for determining distance for magnetic and electric field measurements
VECTOR MAGNETICS200 citations99
US4933640AJun 12, 1990
Apparatus for locating an elongated conductive body by electromagnetic measurement while drilling
VECTOR MAGNETICS390 citations99
US4845434AJul 4, 1989
Magnetometer circuitry for use in bore hole detection of AC magnetic fields
VECTOR MAGNETICS111 citations93