US Trademark Classification US41 Education and entertainment 组织双陆棋游戏比赛（041-2902） Class 41 组织双陆棋游戏比赛 041-2902 Chinese 组织双陆棋游戏比赛 English Organisation of backgammon game competitions Term ID 041-2902 Class 41 Type Services Status Active · added, not since modified (A) Effective date 2025-07-31 Version 12-2025