DIFF Subgroup
B21J 5/10 Piercing billets (in combination with extrusion B21C23/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Piercing billets
CPC: Piercing billets (in combination with extrusion B21C23/00)
Full Title
Full titles differ between systems:
IPC:
Methods for forging, hammering, or pressing; Special equipment or accessories therefor > for performing particular operations > Piercing billets
CPC:
Methods for forging, hammering, or pressing (for working sheet-metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor > for performing particular operations > Piercing billets (in combination with extrusion B21C23/00)
No child classifications to compare. This is a leaf node in both IPC and CPC.