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).

世界多国专利免费、快速下载

谷歌专利下载网站：https://patents.google.com

如果打不开这个网址，可以在无忧专利微信公众号回复：专利下载。获取谷歌专利网站的可用网址。

快速下载世界各国专利文献，包括CN中国、WO/PCT国际知识产权局、US美国、EP欧盟、JP日本、KR韩国、DE德国、FR法国、IT意大利、CA加拿大等国的专利文献。

网站界面以及专利下载示例：

如果想要下载WO开头的专利，输入：WO2017130709A1

如果系统里有这份专利文献，就会给出提示。点进去后，点击右上角的【Download】就可以下载了。

答复意见通知书时的检索