There is atc code, how to check the patent number of this medicine?

1. How to check the patent number 1 and log on to China National Intellectual Property Administration website or China Patent Network (address is Baidu). 2. Click "Advanced Search" in the patent search section on the right. Enter the key words you know, such as patent number or patent name, and then click the red search button. 4. Get all relevant patent search tables, select a patent and enter the specific title page of the patent. 5. If you are prompted to install the plug-in. Then install it as required, otherwise you can't browse the instructions. 6. Click the instruction manual button at the bottom of the patent number to enter the instruction manual page, where you can browse the specific content. 7. Click the Save button in the top line to select the download path. If you choose OK, the download cannot be found successfully. You may not apply, or the number is wrong, or you can't find it because the application is not public. The reasons are as follows: In the patent preliminary examination procedure, the examiner should follow the following examination principles. Principle of confidentiality In the examination and approval procedure of patent application, the examiner shall be responsible for keeping confidential the unpublished or announced patent application documents, other contents related to patent application and other information that should not be disclosed according to the relevant confidentiality provisions. Therefore, if the patent is still in a preliminary examination or unpublished state, the public cannot obtain relevant information. If the staff of the patent office can inquire because of their work needs, but have the obligation of confidentiality, it is illegal to disclose the contents to the public without work needs.