Patent number: After the patent applicant obtains the patent right, the patent number on the patent certificate issued by China National Intellectual Property Administration is ZL (patent initials)+application number.
According to Baidu's current understanding of users, the number of inquiries about patent numbers is increasing day by day, which proves that the inquiry about the authenticity of patent numbers is getting more and more attention, and the patent numbers in China are basically divided into the following two situations:
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. It is the remainder obtained by sequentially multiplying the first eight digits by 2, 3, 4, 5, 6, 7, 8 and 9, adding the sum of their products, and then dividing by 1 1. When the remainder is equal to or greater than 10, it is represented by x, such as patent number ZL95 1 15608. X, the calculation method for calculating the last digit is 9× 2+5× 3+14+15+5× 6+6× 7+0× 8+8.
From this, we can identify the authenticity of the patent and estimate the value content of the patent. Since 2004, the basic format of patent number is 20021000001.1.
The first paragraph 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 authorized patent, that is, the patent number on the authorization certificate issued by China National Intellectual Property Administration, is the application number followed by ZL. For example, the patent number of the authorized patent is ZL2003 10 10002.