DIFF Subgroup
B21C 23/01 starting from material of particular form or shape, e.g. mechanically pre-treated (B21C23/22 takes precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: starting from material of particular form or shape, e.g. mechanically pre-treated
CPC: starting from material of particular form or shape, e.g. mechanically pre-treated (B21C23/22 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Extruding metal; Impact extrusion > starting from material of particular form or shape, e.g. mechanically pre-treated
CPC:
Extruding metal; Impact extrusion > starting from material of particular form or shape, e.g. mechanically pre-treated (B21C23/22 takes precedence)
No child classifications to compare. This is a leaf node in both IPC and CPC.