Locarno Classification for Industrial Designs 19 Stationery and office equipment, artists' and teaching materials 19-06 Materials and instruments for writing by hand, for drawing, for painting, for sculpture, for engraving and for other artistic techniques 钢笔（19-06） Subclass 19-06 钢笔 103169 Chinese 钢笔 English Pens Spanish bolígrafos Number 103169 Category 19-06 Materials and instruments for writing by hand, for drawing, for painting, for sculpture, for engraving and for other artistic techniques Version 洛迦诺分类第十五版（LOC 15，2025-01-01 起施行）；中文取自国家知识产权局《国际外观设计分类表（第15版）》，英文取自 WIPO 官方文本