The application number is 2+6, ***8 digits, the first two digits are serial numbers, and the last six digits are circular numbers, which means that the six digits of 000000-999999 are circulated in sequence.

The patent number is 7 digits. It consists of 1-7 digits, such as 5575 155, 5474 142, etc.

WeChat official account is 4+7, *** 1 1, and the first four digits are the year. Such as 200600000001,20050 158320, etc.

There will be a document type code after the number.

Document type identifier Document type description

A 1 patent application is published before authorization.

A2 Patent application is published (re-published) before authorization.

A9 Publication of Patent Application before Authorization (Amendment)

B 1 patent was not published before authorization.

B2 patent was published before it was granted.

The original codes of C 1, C2 and C3 re-inspection certificates B 1 and B2 are now used to grant patents.

E reprinted patents remain unchanged.

The inventions registered according to law have not changed.

The plant patent application was published before it was authorized.

P2 plant patent has not been published before authorization.

P3 plant patent was published before it was granted.

P4 publication of plant patent application before authorization (re-publication)

P9 Publication of Plant Patent Application before Authorization (Amendment)

American design patents remain unchanged.