The transfer of the porcelain trademark belongs to the 21st class of trademarks. How many categories does the transfer of the porcelain trademark belong to? The porcelain trademark belongs to the 21st class of trademarks. The 21st class of sanitary ware and kitchen trademarks also includes kitchen containers and glass bottles (containers). , porcelain decorations, drinking vessels, soap dishes, brush products, toothbrushes, food thermos containers, cleaning utensils (hand-operated), sprinklers, combs, cosmetic utensils, food thermos containers, leather for glazing. The top ten brands of porcelain: Eagle Ceramics, Marco Polo Ceramics, Oceano Ceramics, Jiajun Ceramics, Qianghui Ceramics, Nengqiang Ceramics, Juncheng Ceramics, Xinruncheng Ceramics, Guanxingwang Ceramics, and Yinuo Ceramics. Trademark Class Trademark Transfer