US Trademark Classification US16 Paper and stationery 泡泡笔（016-1760） Class 16 泡泡笔 016-1760 Chinese 泡泡笔 English Bubble pens Spanish Bolígrafos de burbujas Term ID 016-1760 Class 16 Type Goods Status Active · added, not since modified (A) Effective date 2008-05-08 Version 09-2007