72421312
Apr 13, 1972
Feb 26, 1974
NATIONAL OILWELL VARCO L.P.
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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