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DIFF Subgroup
E21B 10/14

combined with non-rolling cutters other than of leading-portion type

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Drill bits > Roller bits > combined with non-rolling cutters other than of leading-portion type

CPC:

Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > Roller bits (E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50) > combined with non-rolling cutters other than of leading-portion type

No child classifications to compare. This is a leaf node in both IPC and CPC.