OBJECTIVE By studying from the American patent system, to guide the acquisition of patent information from FDA drug database.
目的通过对美国专利政策的研究，对FDA药物专利情报检索进行指导。
The information of invalid drug patent can be sought through patent database in the patent organization of nation or region respectively; also, it can be tracked in terms of online patent gazette.
药品失效专利信息检索可以通过各个国家地区的专利数据库实施，同时也可以通过各个国家地区的专利公报电子版进行跟踪获取。
The information of invalid drug patent can be sought through patent database in the patent organization of nation or region respectively; also, it can be tracked in terms of online patent gazette.
药品失效专利信息检索可以通过各个国家地区的专利数据库实施，同时也可以通过各个国家地区的专利公报电子版进行跟踪获取。
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