IP-Centre.org

Patent Classification Schemes, Country and Document Codes


International Patent Classification IPC:

• WIPO Preface to the IPC

• Guide to the IPC (PDF)

• Current IPC and Older Editions

You can change the IPC Edition on this page with the edition selection pull-down on the left

Previous IPC Edition dates:



ECLA Patent Classification:

• ECLA classifcation

United States Patent Classification

• United States Patent Classifcation Homepage

• Class numbers with titles

• Class numbers only

• United States Patent Classification Index

• Link to United States Office of Classification

Contains other useful links

• USPC to IPC Concordance

• USPC to IPC Reverse Concordance (IPC to USPC)

• USPC Classification Orders

• Dates US Classes Established

• Overview of US Classification System (PDF)

United Kingdom Classification Key (UKC)

• UKC

Kind Codes:

• Examples of Country codes and related Document Codes (PDF)