U.S. federal trademark · Serial No. 72421312 · Reg. No. 0979373
OIL WELL DRILLING TOOLS-NAMELY, DRILL PIPE SLIPS, DRILL COLLAR SLIPS, ROTARY SLIP INSERTS, [ ROTARY TONGS, COMBINATION TONGS, ] TONG DIES, PUMP LINERS, AND MUD PUMP PISTONS
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