DIFF Main Group
E21F 16/00 Drainage (keeping dry foundation sites or other areas in the ground E02D19/00)
Introduced: July 1974
Title
Titles differ between systems:
IPC: Drainage
CPC: Drainage (keeping dry foundation sites or other areas in the ground E02D19/00)
Full Title
Full titles differ between systems:
IPC:
Drainage
CPC:
Drainage (keeping dry foundation sites or other areas in the ground E02D19/00)
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1974.
Child Classifications
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