Based upon Dialog online search, we use Derwent World Patents Index (DWPI) and Derwent Patents Citation Index (DPCI) as data sources to analyze the patents in PEM fuel cell industry.

• 本文基于Dialog联机检索,以德温特世界专利索引数据库和专利引文索引数据库为数据源,对质子交换膜(PEM)燃料电池行业进行了专利分析研究。