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The American publication is called issue, applying for application and granting patent.

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

the patent number is 7 digits. It consists of 1-7 digits, such as: 5575155,5474142, etc.

the public number is 4+7, ***11 digits, and the first 4 digits are the year. For example, 261, 2515832 and other

numbers will be followed by document type indication codes

document type identification codes? Description of literature types

A1? Open the patent application before authorization

A2? Patent application disclosure (re-disclosure)? Disclosure before authorization

A9? Disclosure of patent application (amendment) before authorization

B1? Before the patent was granted, it was not disclosed

B2? Before the patent was granted,

C1, C2 and C3 were disclosed? Review the certificate again? The original codes B1 and B2 are now used to grant patents?

E, no change in the republished patent

H, legally registered invention? No change

P1? Make the plant patent application public before authorization

P2? The plant patent was not disclosed before it was granted

P3? Did you disclose

P4 before the plant patent was granted? Open (re-open) the plant patent application? Disclosure before authorization

P9? Publication (amendment) of plant patent application

There is no change in S design patent before authorization

EP European Patent Office

A1 instruction manual+search report

A2 instruction manual only

A3 only searches the report

B1 authorized patent after the review

B2 objection procedure

US Patent and Trademark Office

A1 patent application publication text

. P>B1 did not disclose

B2 did disclose

China Patent Office

A patent application

C authorized version

American patent documents and their codes

United States Utility Patent, document type identification code A(B1, B2)

Patent Application Publication, document type identification code (A1)

United States Plant Patent, document type identification code P(P2, P3)

Reissued Patent, Document type identification code (E)

Re-examination certificate, document type identification codes B1 and B2(C1, C2 and C3)

Statutory Invention Registration, document type identification code H

design patent, and document type identification code (S).