Skip header and go to main content
About us
Jobs
Contact us
Classification Resources
Toggle navigation
Classification
Revision & Reclassification
CPC
Consolidate Revision Concordance List (RCL)
List of Deleted Symbols
Notice of Changes
Notice of Editorial Corrections
Active CPC Revision Projects
CPC Revision Pre-releases
Published Revision Projects
IPC
Revision & Reclassification Project Status
Locarno
Revision & Reclassification Project Status
USPC
Orders
General Training
CPC
CPC Training
Guide to CPC
IPC
Guide to IPC
FAQ
Strasbourg Agreement
Locarno
About Locarno Classification
FAQ
Locarno Agreement
USPC
Examiner Handbook
Handbook of Classification
Additional Resources
CPC
Scheme
IPC
Scheme
Locarno
Locarno Classification
USPC
Class Titles
Index to USPC
Other
Espacenet Patent Search
JPO Classification system – File Index (FI) and F-terms
Nice Agreement
Vienna Agreement
WIPO Standards on Industrial Property Information and Documentation
Contacts
Classification Standards and Development
Contacts
Lookup Symbol
Scheme
Definition
Concordance
Search
Search CPC
Search
Quick Links:
PDF
Scheme
CPC-to-IPC
Definition
Compilation of
Changes
Recent Changes List
CPC to IPC Concordance for Subclass
A
23N
Printable Version [PDF]
Version:
2024.01
CPC Group
IPC Group
A
23N
1/00
A
23
N
1/00
A
23N
1/003
A
23
N
1/00
A
23N
1/006
A
23
N
1/00
A
23N
1/02
A
23
N
1/02
A
23N
3/00
A
23
N
3/00
A
23N
3/02
A
23
N
3/02
A
23N
3/04
A
23
N
3/04
A
23N
3/06
A
23
N
3/06
A
23N
4/00
A
23
N
4/00
A
23N
4/02
A
23
N
4/02
A
23N
4/04
A
23
N
4/04
A
23N
4/06
A
23
N
4/06
A
23N
4/08
A
23
N
4/08
A
23N
4/085
A
23
N
4/08
A
23N
4/10
A
23
N
4/10
A
23N
4/12
A
23
N
4/12
A
23N
4/14
A
23
N
4/14
A
23N
4/16
A
23
N
4/16
A
23N
4/18
A
23
N
4/18
A
23N
4/20
A
23
N
4/20
A
23N
4/22
A
23
N
4/22
A
23N
4/24
A
23
N
4/24
A
23N
5/00
A
23
N
5/00
A
23N
5/002
A
23
N
5/00
A
23N
5/004
A
23
N
5/00
A
23N
5/006
A
23
N
5/00
A
23N
5/008
A
23
N
5/00
A
23N
5/01
A
23
N
5/01
A
23N
5/03
A
23
N
5/03
A
23N
5/08
A
23
N
5/08
A
23N
7/00
A
23
N
7/00
A
23N
7/002
A
23
N
7/00
A
23N
7/005
A
23
N
7/00
A
23N
2007/007
A
23
N
7/00
A
23N
7/01
A
23
N
7/01
A
23N
7/02
A
23
N
7/02
A
23N
7/023
A
23
N
7/02
A
23N
7/026
A
23
N
7/02
A
23N
7/04
A
23
N
7/04
A
23N
7/08
A
23
N
7/08
A
23N
7/10
A
23
N
7/10
A
23N
11/00
A
23
N
11/00
A
23N
12/00
A
23
N
12/00
A
23N
12/005
A
23
N
12/00
A
23N
12/02
A
23
N
12/02
A
23N
12/023
A
23
N
12/02
A
23N
12/026
A
23
N
12/02
A
23N
12/04
A
23
N
12/04
A
23N
12/06
A
23
N
12/06
A
23N
12/08
A
23
N
12/08
A
23N
12/083
A
23
N
12/08
A
23N
12/086
A
23
N
12/08
A
23N
12/10
A
23
N
12/10
A
23N
12/12
A
23
N
12/12
A
23N
12/125
A
23
N
12/12
A
23N
15/00
A
23
N
15/00
A
23N
15/001
A
23
N
15/00
A
23N
15/003
A
23
N
15/00
A
23N
15/005
A
23
N
15/00
A
23N
2015/006
A
23
N
15/00
A
23N
2015/008
A
23
N
15/00
A
23N
15/01
A
23
N
15/01
A
23N
15/02
A
23
N
15/02
A
23N
15/025
A
23
N
15/02
A
23N
15/04
A
23
N
15/04
A
23N
15/045
A
23
N
15/04
A
23N
15/06
A
23
N
15/06
A
23N
15/08
A
23
N
15/08
A
23N
15/10
A
23
N
15/10
A
23N
15/12
A
23
N
15/12
A
23N
17/00
A
23
N
17/00
A
23N
17/001
A
23
N
17/00
A
23N
17/002
A
23
N
17/00
A
23N
17/004
A
23
N
17/00
A
23N
17/005
A
23
N
17/00
A
23N
17/007
A
23
N
17/00
A
23N
17/008
A
23
N
17/00
A
23N
17/02
A
23
N
17/02
Skip footer and go to main content