If you want to find the national patent number, go directly to the official website of the State Intellectual Property Office. The following are the specific steps for query:
First, open the browser and visit the official website of the State Intellectual Property Office. On its home page, you will see a prominent location where there is usually an entrance for "Patent Examination Information Inquiry", click to enter.
Next, if you are a registered user of the system, you need to enter your account number and password, and then click to log in. After logging in, the page will be more personalized to facilitate your subsequent operations. At this point, find the query column and enter the patent number you need to find accurately.
Finally, click the search icon, and the system will immediately start searching and display relevant patent information. The whole process is simple and clear. Just follow the prompts and you can easily find the national patent number you need.