What's the significance of patent number?

The number of the patent number is of course meaningful. \x0d\ Take ZL20 10 1004567.7 as an example. \x0d\ZL stands for patent, which is the abbreviation of patent pinyin. However, for applications that have not yet obtained a patent, the word "ZL" cannot be marked. \x0d\20 10 represents the year of patent application \ x0d \ 65438+.