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PCE
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DIFF Subgroup
B21D 3/12

by stretching with or without twisting (by twisting only B21D11/14)

Introduced: September 1968

Title

Titles differ between systems:

IPC: by stretching with or without twisting

CPC: by stretching with or without twisting (by twisting only B21D11/14)

Full Title

Full titles differ between systems:

IPC:

Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts > by stretching with or without twisting

CPC:

Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts (straightening of well casings in situ E21B; ) > by stretching with or without twisting (by twisting only B21D11/14)

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