DIFF Subgroup
A01B 3/28 Alternating ploughs
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Ploughs with fixed plough-shares > Tractor-drawn ploughs > Alternating ploughs
CPC:
Ploughs with fixed plough-shares > Tractor-drawn ploughs (A01B3/04 takes precedence) > Alternating ploughs
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
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