Guide to STN Patent Databases – Basic Version - Paton - TU Ilmenau

A printed IPC code is according to this pattern:
106
ANNAnnN/NNnnn
A: Letter
N: Number
Guide to STN Patent Databases
n: Number, optional; if these positions are not required they are not printed (no leading/trailing zeroes)
Section Class Subclass Group Subgroup
A NN A nnN / NNnnn
A H 01 99 A Z 1 999 / 00 99999
New concept: IPC codes (one or more) are assigned that characterise the core of the invention (Invention IPC). For
this, the full document is considered, not only the claims. In addition non-invention s are
assigned. The IPC codes are printed on the publication in accordance with WIPO ST.10/C like this:
Italic: All (Advanced Level Codes / Full version 2006-2010)
Non-italic = Core Level Codes / Basic version (2006-2010)
Bold = Invention IPC
Non-bold = non-invention IPC
Document (fictitious), with revision indicator:
A printed IPC code is according to this pattern:
ANNAnnnN/NNnnnn
A: Letter
N: Number
n: Number, optional; if these positions are not required they are not printed (no leading/trailing zeroes)
Section Class Subclass Group Subgroup
A NN A nnnN / NNnnnn
A H 01 99 A Z 1 9999 / 00 999999
The revision indicator on the printed publication has this format:
(YYYY.MM)
YYYY: Year
MM: Month
The data of the patent offices include other information that can be entered in the databases.
Existing documents in the databases are continuously revised to the current revision of the IPC.
Revision indicator