CPC Subgroup
E04F 11/02 Stairways; Layouts thereof
Full Title
Stairways, ramps, or like structures (mounting or marking-off stairways E04F21/26; of temporary construction E04G27/00; means for facilitating access to swimming pools E04H4/144; ); Balustrades; Handrails (ladders permanently attached to fixed structures E06C9/00) > Stairways; Layouts thereof
6 direct subcodes
Child Classifications
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- E04F 11/022 characterised by the supporting structure
- E04F 11/04 Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible (ship ladders B63B; stairs for aircraft B64F; escalators or moving walkways B66B)
- E04F 11/09 Tread-and-riser units
- E04F 11/104 Treads