Then it described the chinese patent classification, Chinese patent retrieval system and the method how to use them.
归纳了我国专利分类体系和专利文献的检索工具。
METHODS Introduce American drug patent system and the method of FDA information retrieval, analyze and ravel out the problems from FDA information retrieval.
方法介绍美国药物专利方面的法规政策及FDA专利情报的检索，并对在FDA及专利数据库检索过程中遇到的问题进行分析。
Because human evaluation is time-consuming, we propose a new citation-based method for automatic evaluation of patent information retrieval.
专利信息是集技术、法律、经济信息于一体的综合性信息源。
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