EU Trademark Classification EU19 Building materials Louvre vents (Non-metallic -) for buildings Class 19 Louvre vents (Non-metallic -) for buildings 39990 建筑物用非金属百叶通风口 Chinese 建筑物用非金属百叶通风口 English Louvre vents (Non-metallic -) for buildings Site ref. 39990 Class 19 Included in Harmonised Database (HDB), TM5 ID List