The application number is the number given to a patent application by the China Patent Office at the same time when it accepts a patent application. All of them are coded by eight digits, with the first two digits representing the year of application, the third digit representing different patent types, "1" representing the invention patent, "2" representing the utility model, and "3" representing the design patent. The last five digits are the serial numbers of all patent applications in that year, and finally, the decimal point and a computer check code are added. Example:
99 104538.6。