1. The patent number is represented by 13 digits, the first two digits of the application number indicate the application year, the middle three digits indicate the application type, and the last eight digits indicate the application serial number and check code.
2. The patent category code is 1, which stands for invention patent, for example: zlxxxx1xxxxxxxx.x; ; Patent category code 2 stands for utility model patent, for example: zlxxxx2xxxxxxx.x; ; Patent category code 3 stands for design patent, such as ZLxxxx3xxxxxxx.x. X.
3. After the foreign patent application that entered the national examination stage in China from 1 99865438+1October1was granted the patent right, the category code in ZL xxxx xxxxxxxx is "8". X represents the invention patent authorized by the foreign applicant in China. The category code "9" in the patent number ZLXXXXXX 9XXXXXX. X.X after being granted the patent right represents the utility model patent authorized by the foreign applicant in China.
4. It is worth emphasizing that the category code "8" in the patent number ZLxxxx8xxxxxxxxxx.x.x of the foreign patent application that entered the national examination stage in China from 1 99865438+1October1represents the invention patent authorized by the foreign applicant in China. The category code "9" in the patent number ZLXXXXXX 9XXXXXX. X.X after being granted the patent right represents the utility model patent authorized by the foreign applicant in China.
From the above information, we can further judge.