The world patent index is an important tool for searching patents. In which retrieval system can I find it?

The world patent index is an important tool for searching patents. Online China patents can be searched through multiple websites, including paid websites and free websites.

1, website of China National Intellectual Property Administration, China.

2.IncoPat scientific and technological innovation information platform.

3. China Patent Information Network.

4. China Intellectual Property Network.

5.innojoy patent search engine.

6.Baiteng.com patent retrieval system.

7. Patent Star-Patent Search System.

8.SOOPAT patent search engine.

9.PatSnap intellectual bud patent retrieval system. These platforms are all searchable.