专利文献 meaning in Chinese

parent documentation
patent documentation
patent leveling
patent literature
pd

Searching the free foreign patent information on internet
因特网上免费检索国外专利文献
Using patent literature to frame the enterprise patent strategy
利用专利文献制定企业专利战略
Inpadoc international patent documentation center
国际专利文献中心
May the time limit stipulated in the patent law be extended
专利文献是什么？检索专利文献有什么用？
Analysis on the patent documents information elementarily of textile
纺织专利文献信息资源的分析与探讨

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