DIFF Subgroup
E21B 10/55 with preformed cutting elements
Introduced: January 2006
Full Title
Full titles differ between systems:
IPC:
Drill bits > characterised by wear resisting parts, e.g. diamond inserts > the bit being of the rotary drag type, e.g. fork-type bits > with preformed cutting elements
CPC:
Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > characterised by wear resisting parts, e.g. diamond inserts > the bit being of the rotary drag type, e.g. fork-type bits > with preformed cutting elements
No child classifications to compare. This is a leaf node in both IPC and CPC.