What's the difference between ZL patent number and CN number?

ZL begins with the authorized patent number, which proves that it has been authorized. CN begins with WeChat official account, indicating that the patent application is being made public or has been made public, or it may not be authorized.

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).

Application number: When the patent applicant filed a patent application in China National Intellectual Property Administration, China National Intellectual Property Administration gave the patent application acceptance notice and patent application number.

Patent number: After the patent applicant obtains the patent right, the patent number on the patent certificate issued by China National Intellectual Property Administration is ZL (patent initials)+application number.