To find the national patent number, you should directly visit the official website of the State Intellectual Property Office to query. The following are the specific steps:
First, open the browser and visit the official website of the State Intellectual Property Office. In a prominent position on the homepage, you will see a search bar or navigation menu, where patent search options are usually listed. Click this link or option to enter the patent review information query page.
Next, if you are a registered user of the bureau, you need to log in to your account. Enter your username and password and click the Login button. If you have not registered yet, you need to register and activate your account first, and follow the website prompts to complete the relevant steps.
After logging in, you will find a query box on the page, where you can enter the patent number you want to query. Make sure you enter the correct patent number format and click the search icon. The page will display relevant information about the patent you are searching for, including patent status, applicant, publication date and other details.
In summary, the entire process of querying the national patent number is to log in to your personal account (if you have one) through the official website of the State Intellectual Property Office, and then follow the instructions to enter the patent number to search. This way, you can easily get the information you need.