DIFF Main Group
B21H 3/00 Making helical bodies or bodies having parts of helical shape (helical gears B21H5/00; forming tubes or tube walls into helical shape B21D11/06, B21D15/04)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Making helical bodies or bodies having parts of helical shape
CPC: Making helical bodies or bodies having parts of helical shape (helical gears B21H5/00; forming tubes or tube walls into helical shape B21D11/06, B21D15/04)
Full Title
Full titles differ between systems:
IPC:
Making helical bodies or bodies having parts of helical shape
CPC:
Making helical bodies or bodies having parts of helical shape (helical gears B21H5/00; forming tubes or tube walls into helical shape B21D11/06, B21D15/04)
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B21H 3/12 articles with helicoidal surface (bending strip or the like helically B21D11/06) IPC+CPC Available in IPC and CPC