How to check the national patent number

The national patent number needs to be checked at the State Intellectual Property Office.

In the State Intellectual Property Office, the steps to query the patent number are as follows:

1. Click on the search result entry to enter the State Intellectual Property Office's webpage.

2. On the website of the State Intellectual Property Office, click Patent Examination Information Query.

3. Enter your account number and password, and click Login.

4. After logging in, enter the patent number you want to query.

5. Click the search icon to complete the search.