US Trademark Classification US21 Household and kitchen utensils 清洁布（021-420） Class 21 清洁布 021-420 Chinese 清洁布 English Cleaning cloths Spanish Paños de limpieza Term ID 021-420 Class 21 Type Goods Status Active · added, not since modified (A) Effective date 1991-04-02 Version 07-1997