中国专利局文献馆内 ,收藏了几百万件专利文献。要从这浩瀚的信息海洋里找到所需要的信息 ,该从哪里入手呢 ?《中国专利索引》是检索专利文献的一种十分有效的工具书。该索引分《分类年度索引》和《申请人、专利权人年度索引》两种。前者按照国际专利或国际外观设计分类顺序编 Chinese Patent Office literature museum, the collection of millions of patent documents. Where should I start to find the information I need from the sea of ​​vast information? The “China Patent Index” is a very useful reference book for searching patent documents. The index is divided into “annual classification index” and “applicant, patent owner annual index” two. The former in accordance with international patent or international design classification sequence