Provisions on the marking method of patent mark and patent number: If the patent mark and patent number are marked, the following contents shall be marked.
(a) indicate the categories of patent rights in Chinese, such as China invention patent, China utility model patent and China design patent;
(2) The patent number of the patent granted by China National Intellectual Property Administration, in which "ZL" means "patent", the first and second digits indicate the year when the patent application was filed, the third digit indicates the patent category, and the fourth digit is the serial number and computer check digit.
In addition to the above contents, the annotator may attach other text and graphic marks, but the attached text and graphic marks and their marking methods shall not mislead the public.
Look at the patent number Application year number+patent application type+application serial number. The first two digits indicate the application year number, and the third digit: 1= invention patent application.
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.
For example, the drainage device of Yangzi refrigerator has patent number ZL8820 1465. X, that is, this patent is 1465 utility model patent with application number 1988.