Among the type codes actually used in the American patent system:
By the end of 2000
Patent (public)
A 1？ Patent (open) to date
B 1~B3 N retest certificate
H or p or P 1 Fabric Patent (No.1- 1 1727)
S 1 or s design patent
From 200 1
A 1 first publication of patent application
Re-publication of A2 patent application
Correction of Patent Application A9
B 1 initial disclosure of authorized patents
B2 Authorized Patent Published for the Second Time
B8 Correction of Title Page of Authorized Patent
B9 full text correction of authorized patent
C 1~C9 re-inspection certificate
Republished patent
F 1~F9 n Re-inspection certificate reprinted
H 1 legally registered inventions
P 1 First publication of plant patent application
P2 and P3 authorized the first and second publication of textile patents.
Re-publication of P4 Plant Patent Application
Correction of P9 Plant Patent Application
S 1 design patent
In the China patent system, the utility model patent application is indicated by U (as of 1993). Since then, the utility model patent has adopted the non-substantive examination system, and the authorized utility model patent has been identified by Y.
Refer to the Practical Handbook of Patent Documents in Various Countries (June 2006).