CPC Main Group
F23L 13/00 Construction of valves or dampers for controlling air supply or draught
4 direct subcodes
Child Classifications
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- F23L 13/02 pivoted about a single axis but having not other movement (formed as linked slats each pivoted about an axis F23L13/08)
- F23L 13/06 slidable only
- F23L 13/08 operating as a roller blind; operating as a venetian blind
- F23L 13/10 having a compound movement involving both sliding and pivoting