DIFF Subgroup
B21D 3/02 by rollers
Introduced: September 1968
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 rollers
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 rollers
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
Child Classifications
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- B21D 3/05 arranged on axes rectangular to the path of the work since 1974 IPC+CPC Available in IPC and CPC