EU Trademark Classification EU21 Household and kitchen utensils Porous glass Class 21 Porous glass 44937 多孔玻璃 Chinese 多孔玻璃 English Porous glass Site ref. 44937 Class 21 Included in Harmonised Database (HDB), Nice Alphabetical List, TM5 ID List, WIPO Madrid Goods and Services (MGS)