U.S. federal trademark · Serial No. 73478089 · Reg. No. 1345799
A MECHANICAL INSTRUMENT FOR RECORDING DATA CONCERNING WELL DRILLING OPERATIONS, SUCH AS DRILLING TIME IN MINUTES PER FOOT, ROUND TRIP TIME FOR CHANGING BITS AND ADDING JOINTS, SHUT-DOWN TIME AND THE LIKE; PRESSURE GAUGES, PRESSURE TRANSMITTERS, LEVEL TRANSMITTERS, INSTRUMENTATION CONSOLES AND FLOW TRANSMITTERS, ALL FOR USE IN THE WELL DRILLING INDUSTRY
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