The second part reviews the system of patent indirect infringement in America, Japan and EU.

第二部分着重比较分析了美国、日本和欧盟的专利间接侵权制度。

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So studying on indirect infringement in patent is sorely needed both in theory and in practice.

因此，对专利间接侵权问题进行系统研究具有重要的意义。

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The indirect infringement cases of patent rights are increased quickly.

作者在此文中尝试对专利间接侵权制度做一些深入探讨。

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