What is the format of China patent number?

The numbering rules of patent application number 1 993-September 30, 2003: application year number (2 digits)+patent type (1 digit)+application sequence number (5 digits)+computer check bit (1digit), such as: 8920000/kloc-.

2003. 10.0 1 till now, the numbering rules are: application year (4 digits)+patent application type (1 digit)+application sequence number (7 digits)+computer check digit (1 digit), for example, 200330/.

Types of patent applications:

1= application for invention patent

2= utility model patent application

3= Application for patent for design

8= PCT invention patent application entered the national stage in China.

9= PCT utility model patent application entered the national stage in China.