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Office of Patent Classification

The Office of Patent Classification maintains the patent classification systems.

Organization and Staff

Cooperative Patent Classification (CPC)

The Cooperative Patent Classification (CPC) effort is a joint partnership between the United States Patent and Trademark Office (USPTO) and the European Patent Office (EPO) where the Offices have agreed to harmonize their existing classification systems (European Classification (ECLA) and United States Patent Classification (USPC) respectively) and migrate towards a common classification scheme. 

I don’t know anything about CPC.  Where do I start?

I know a USPC classification and I want to find a relevant CPC. What do I do?

I know a CPC group symbol (e.g., B02C 19/0081) and I want to see the group title, browse the scheme or read its definition. How do I do this?

I want to download CPC scheme and definition source files (e.g., XML, PDF); and CPC to IPC concordance files. How do I do this?

  • Use the CPC Deliverables page  on the Cooperative Patent Classification bi-lateral Web site to download this information.

Additional CPC Resources:

United States Patent Classification (USPC) Resources

I don’t know anything about USPC.  Where do I start?

I know a USPC classification symbol (e.g., Class 345 or Class/Subclass 345/418) and I want to:

Documents and Reports Related to the USPC Manual of Classification

I want to understand more about how USPC has changed over time

A Classification Order documents changes to the  UPSC which have occurred while maintaining the system over time.  A Classification Order identifies Reclassification Project team members, USPC classifications abolished, USPC classifications established, new classification definitions and changes to existing classification definitions.

Relationships between classifications and organizations

Lists of withdrawn USPTO Patent Publications

International Classification Resources

Related Patent Links

 

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Last Modified: 9/16/2013 2:00:48 PM