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PCE
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DIFF Subgroup
B21D 31/02

Stabbing or piercing, e.g. for making sieves (dimpling B21D22/04; perforating by punching B21D28/24)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Stabbing or piercing, e.g. for making sieves

CPC: Stabbing or piercing, e.g. for making sieves (dimpling B21D22/04; perforating by punching B21D28/24)

Full Title

Full titles differ between systems:

IPC:

Other methods for working sheet metal, metal tubes, metal profiles > Stabbing or piercing, e.g. for making sieves

CPC:

Other methods for working sheet metal, metal tubes, metal profiles (deforming one surface of tubes helically by rolling B21H3/00; upsetting B21J5/08; working metal by removing material therefrom B23; embossing B44B) > Stabbing or piercing, e.g. for making sieves (dimpling B21D22/04; perforating by punching B21D28/24)

No child classifications to compare. This is a leaf node in both IPC and CPC.