专利检索 主要包括几个类型，每一个类型的具体操作又不一样。因此可需要根据自己解锁的目的来确定检索的方法。 

专利检索的类型（目的）：

申请前的新颖性检索：

侵权检索：

规避检索：

现有技术检索：

There are many possible reasons for needing a patent search. Some examples are:

1. an inventor would like to make sure his invention is unique before he spends time and money to obtain a patent (this would be a Novelty search).

2. a company would like to produce a product, and although they do not wish to patent the product themselves, they want to make sure that they do not get sued by someone else that might have already patented the idea (this would be an Infringement search).

3. Company A is making a product, and is being sued by Company B, which believes it holds a patent on the product, and Company A would like to prove that Company B's patent is invalid (this would be a Validity search).

4. a researcher would like a comprehensive listing of the most recent patents in a certain field, to help guide his research (this would be a State-of-the-Art search).

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答复意见通知书时的检索