US Trademark Classification US21 Household and kitchen utensils 奶桶（021-209） Class 21 Milk churns 021-209 奶桶 Chinese 奶桶 English Milk churns Spanish Bidones de leche Term ID 021-209 Class 21 Type Goods Status Active · added, not since modified (A) Effective date 1991-04-02 Version 07-1997