DIFF Subgroup
E04B 9/02 having means for ventilation or vapour discharge
Introduced: January 1990
Full Title
Full titles differ between systems:
IPC:
Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation > having means for ventilation or vapour discharge
CPC:
Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation (ceilings used as forms for making floors E04B5/00; coverings or linings for ceilings E04F13/00) > having means for ventilation or vapour discharge
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.
Child Classifications
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