EU Trademark Classification EU11 Lighting, heating and air conditioning 防止火焰蔓延用通风调节器（28816） Class 11 防止火焰蔓延用通风调节器 28816 Chinese 防止火焰蔓延用通风调节器 English Draught regulators for preventing the spread of flames Site ref. 28816 Class 11 Included in Harmonised Database (HDB)