U.S. federal trademark · Serial No. 72282145 · Reg. No. 0866273
APPARATUS AND INSTRUMENTS USED FOR PHASE MEASURMENTS IN ELECTROMAGNETIC PROSPECTING FOR ORE-NAMELY, FIELD GENERATING CABLES, PICK-UP COILS, COMPENSATOR-AMPLIFYING UNITS, EAR PHONES, GENERATING SETS, CONTROL BOXES, AND CONNECTING CABLES
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