US Trademark Classification US21 Household and kitchen utensils 玻璃丝（021-53） Class 21 玻璃丝 021-53 Chinese 玻璃丝 English Spun glass Spanish Vidrio hilado Term ID 021-53 Class 21 Type Goods Status Active · added, not since modified (A) Effective date 1991-04-02 Version 07-1997