DIFF Subgroup
E21B 10/12 with discs cutters
Introduced: January 1980
Title
Titles differ between systems:
IPC: with disc cutters
CPC: with discs cutters
Full Title
Full titles differ between systems:
IPC:
Drill bits > Roller bits > with disc cutters
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) > with discs cutters
No child classifications to compare. This is a leaf node in both IPC and CPC.