B21J 5/12 Forming profiles on internal or external surfaces (making screw-thread by forging, pressing, or hammering B21K)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Forming profiles on internal or external surfaces
CPC: Forming profiles on internal or external surfaces (making screw-thread by forging, pressing, or hammering B21K)
Full Title
Full titles differ between systems:
Methods for forging, hammering, or pressing; Special equipment or accessories therefor > for performing particular operations > Forming profiles on internal or external surfaces
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 > Forming profiles on internal or external surfaces (making screw-thread by forging, pressing, or hammering B21K)
No child classifications to compare. This is a leaf node in both IPC and CPC.