Application year number+patent application type+application serial number
The first two digits indicate the year of application, and the third digit indicates:
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.
The last 5 digits are the application serial number.
The number after the decimal point is the check code of the computer, which is the remainder obtained by multiplying the first eight bits by 2, 3, 4, 5, 6, 7, 8 and 9 in turn, adding the sum of their products, and then dividing by 1 1. When the remainder is greater than or equal to 10, it is represented by X.
The patent number is ZL8820 1465. X, that is, this patent is 1465 utility model patent with application number 1988.