EU Trademark Classification EU11 Lighting, heating and air conditioning 清洁空气用静电除尘器（29131） Class 11 清洁空气用静电除尘器 29131 Chinese 清洁空气用静电除尘器 English Electrostatic precipitators for cleaning air Site ref. 29131 Class 11 Included in Harmonised Database (HDB)