DIFF Subgroup
E04D 13/035 characterised by having movable parts
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Special arrangements or devices in connection with roof coverings; Roof drainage > Sky-lights; Domes; Ventilating sky-lights > characterised by having movable parts
CPC:
Special arrangements or devices in connection with roof coverings; Roof drainage (ventilation tiles E04D1/30; ventilation slabs E04D3/40; internal channels E04F17/00) > Sky-lights; Domes; Ventilating sky-lights (E04D13/14 takes precedence; structures therefor, E04B7/18; ) > characterised by having movable parts
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
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