with rotatable lamellae

Full Title

Special arrangements or measures in connection with doors or windows ( ; screening or similar protective devices E06B9/00) > for providing ventilation, e.g. through double windows; Arrangement of ventilation roses (airflow control members per se F24F13/08) > Louvre doors, windows or grilles > with rotatable lamellae

Child Classifications

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• E06B 7/086 interconnected for concurrent movement