ZL is the pinyin abbreviation of the word patent, which means that the patent has been authorized. This is the patent number. CN stands for the abbreviation of China, and the number at the beginning of CN is the patent publication number (only invention patents have this number), not the patent number. The invention patent can only be examined in substance after it is published, which does not mean that the patent has been authorized.

Extended data

The patent number is the number given when the patent right is granted, and it is a submission number. The submission number is the serial number compiled by each industrial property office when publishing patent documents (including public publication and reading and copying only).

The patent number before 2004 is divided into four sections: for example, 97 10 1765.4. The first two parts indicate the year when the patent application was filed, such as "97" indicating 1997; The second paragraph consists of the third digit, indicating the type of patent application, and "1" indicates invention (if it is utility model "2", design "3", PCT invention patent application "8" and PCT utility model patent application "9"); The third paragraph consists of the fourth to eighth digits, indicating the serial number of this kind of application in the current year, for example, 0 1765 indicates the application in the current year 1765; The fourth paragraph consists of the ninth digit or symbol, which is a check bit automatically generated by the computer. Is the remainder obtained by sequentially multiplying the first eight bits by 2, 3, 4, 5, 6, 7, 8 and 9, adding their products, and then dividing them by 1 1. When the remainder is equal to or greater than 10, it is represented by x.

References:

Patent number-Baidu Encyclopedia