DIFF Subgroup
E21B 4/04 Electric drives (E21B4/12 takes precedence)
Introduced: January 1980
Title
Titles differ between systems:
IPC: Electric drives
CPC: Electric drives (E21B4/12 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Drives for drilling, used in the borehole > Electric drives
CPC:
Drives for drilling, used in the borehole > Electric drives (E21B4/12 takes precedence)
No child classifications to compare. This is a leaf node in both IPC and CPC.