Locarno Classification for Industrial Designs 19 Stationery and office equipment, artists' and teaching materials 19-04 Books and other objects of similar outward appearance 书本（19-04） Subclass 19-04 书本 103125 Chinese 书本 English Books Spanish Libros Number 103125 Category 19-04 Books and other objects of similar outward appearance 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