It consists of 8 digits plus a decimal point and a number (or the English letter X). The first two digits represent the year number of the patent application year, the third digit represents the category of the patent application, the last five digits represent the serial number of a patent application this year, and the digit after the decimal point or "X" is the check bit of the computer.
The patent number is the number given when the patent right is granted, and it is a submission number. The submission number is the serial number compiled by each industrial property office when publishing patent documents (including public publication and reading and copying only).
The application number is the application number of the patent applicant when he filed a patent application in China National Intellectual Property Administration. China National Intellectual Property Administration gave the notification of patent application acceptance and the patent application number.
The patent number is a patent certificate issued by China National Intellectual Property Administration after the patent applicant obtained the patent right. The patent number is ZL (patent initials) plus the application number. If a patent is being applied, but the ZL letter is added before the application number (making consumers mistakenly think it is an authorized patent), it is a counterfeit patent and the administrative department for industry and commerce will investigate and deal with it according to law.
International patent classification is a general international patent literature classification. The classification number obtained by classifying patent documents (specifications) with the international patent classification table is called the international patent classification number, which is usually abbreviated as IPC number. IPC adopts the classification principle of combining function with application, with function as the main and application as the auxiliary.