U.S. federal trademark · Serial No. 71546036 · Reg. No. 0522173
ROLLER TYPE EARTH DRILLING BITS, [ SCRAPE TYPE EARTH DRILLING BITS; ] BIT BREAK OUT PLATES FOR RECEIVING AND HOLDING EARTH DRILLING BITS WHILE CONNECTING AND DISCONNECTING THEM FROM DRILL STEMS; [ TOOL JOINTS FOR DRILL STEMS; ] PIPE THREAD PROTECTORS; [ EARTH DRILLING CORE BITS AND WIRE LINE RETRACTABLE CORE BARRELS THEREFOR, BOTH PROTRUDING AND NONPROTRUDING TYPES; DRILL COLLARS; DRILLING SUBSTITUTES SUCH AS TUBULAR THREADED CONNECTING ELEMENTS; ] EARTH BORE HOLE REAMERS; EARTH DRILLING PILOT BITS; [ EARTH DRILLING CORE BITS AND NON-RETRACTABLE CORE BARRELS FOR USE THEREWITH; EARTH DRILLING BASKET BITS ADAPTED TO TRAP AND REMOVE LOST NON-DRILLABLE PARTS FROM AN EARTH BORE HOLE; ] AND PARTS THEREFOR
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