EU Trademark Classification EU11 Lighting, heating and air conditioning Draught dampers for preventing the spread of flames Class 11 Draught dampers for preventing the spread of flames 28780 防止火焰蔓延用风门 Chinese 防止火焰蔓延用风门 English Draught dampers for preventing the spread of flames Site ref. 28780 Class 11 Included in Harmonised Database (HDB)