What is the patent number based on?

The meaning of patent number According to Baidu's knowledge of users, the number of inquiries about patent number is increasing day by day, which proves that people pay more and more attention to the authenticity of patent number. The patent number of China is basically divided into the following two situations: the patent number before 2002 is divided into four sections: for example, 97 10 1765.4. The first paragraph is the first two digits, indicating the year when the patent application was filed, such as "97". 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. It can be any number or character x between 0 and 9, such as "4" in this example. Since 2002, the basic format of patent number is 20021000001.1,and the first paragraph of 2002 is 2002; The second paragraph consists of the fifth digit, indicating the application type; The third paragraph consists of the sixth to twelfth digits, representing the application serial number of that year (the increase in figures represents the increase in the number of applications in recent years, which is really gratifying and encouraging; On the other hand, it has indeed increased the workload and extended the time for the Intellectual Property Office); The fourth paragraph consists of the last digit or symbol, which is a check bit automatically generated by the computer and given by the computer. The patent number of the patent that has been authorized, that is, the patent number on the authorization certificate issued by China National Intellectual Property Administration, is the application number in front of ZL. For example, the patent number granted by XXX is ZL2003 10 100002.