在确认无效诉讼与撤销诉讼的关系上，宜把确认无效诉讼看成撤销诉讼的补充诉讼类型。

On the relationship between invalid affirmation litigation and revocation litigation, it is better to consider invalid affirmation litigation as a supplement of revocation litigation.

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针对行政主体所做出的无效行政行为，许多国家都有专门的确认无效诉讼制度向相对人提供救济。

The relief system of the administrative invalid affirmation litigation for the invalid administrative act is very common in many countries.

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在1950年至1975年间，在巡回法院，每四起专利诉讼中有三起被判无效或未侵权。

Between 1950 and 1975, three out of every four patents in the circuit courts were ruled invalid or not infringed.

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