US Trademark Classification US16 Paper and stationery 美术用粉笔（016-3571） Class 16 美术用粉笔 016-3571 Chinese 美术用粉笔 English Chalks for artists' use Term ID 016-3571 Class 16 Type Goods Status Active · added, not since modified (A) Effective date 2024-03-21 Version 12-2024