How to check whether a product has a patent?

1. Enter the patent examination information of China and many countries in the browser address bar, and click Enter;

2. After entering the interface, select public inquiry without registering an account;

3. Click on the reading notes, then pull to the bottom of the page, choose to agree with the above statement, and click Continue;

4. After entering the interface, you will see a lot of blanks to fill in, just fill in the patent number of the product;

5. After input, fill in the verification code, and then click Query.