How to understand the numbering rules of patent contribution numbers

Anyone familiar with patent knowledge knows the importance of patent literature. Therefore, understanding the numbering system of patent submission numbers will play a very positive role in identifying patent documents and consulting patent documents in China. Writing rules of patent contribution number Patent contribution number is represented by 9 Arabic numerals, including application type number and serial number. 1 in the patent contribution number indicates the application type number, with the second place; 9 digits (***8 digits) are document serial numbers, indicating the sequence of document publication or announcement. (1) The application category number of the patent document number is represented by 1 Arabic numerals. The meanings of the numbers used are as follows: 1, which means an application for a patent for invention; 2, said the utility model patent application; 3, said the design patent application. The meaning of other Arabic numerals not included in the above-mentioned application category number when used as category number shall be stipulated separately by China National Intellectual Property Administration. (II) Document serial number of the patent contribution number The serial number of the patent contribution number is represented by eight consecutive Arabic numerals, and it increases in different serial numbers according to the first announcement of an application for a patent for invention or the first announcement of an application for a utility model or design. The announcement number of invention patent authorization follows the patent contribution number when the application for invention patent was first published. Document identification number given when publishing patent application, patent application approval announcement and patent authorization announcement.