失效专利的主题挖掘与应用分析——以2007—2016年镜头失效专利为例

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1000-7490|40|12|128-133

ISSN: 1000-7490

Source: 情报理论与实践, Vol.40, Iss.12, 2017-01, pp. : 128-133

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Abstract