About the International Patent Classification (IPC)
- Preface to the IPC
- Simplification of the IPC
- Guide to the IPC [version 2011 PDF, DOC] [version 2009 PDF]
- Frequently Asked Questions about the IPC
Related links:
- Guidelines for Revision of the IPC [PDF] [DOC]
- Guidelines for Determining Subject Matter to be Classified [PDF] [DOC]
- Guidelines for Determining Where to Classify Patent Documents [PDF] [DOC]
- WIPO Standard ST.8 (Standard Recording of International Patent Classification (IPC) Symbols on Machine-Readable Records) [PDF]
- Use of the simplified IPC by Industrial Property Offices [PDF] [DOC]
