The WIPO technology concordance table links the International Patent Classification (IPC) symbols with thirty-five fields of technology. The concordance table is updated on a regular basis to reflect revisions to the IPC.
Last update date: January 2013
The latest version of the concordance table is available in an Excel file [XLS]
The concept and methodology used to develop the concordance as well as the initial version of the concordance table are presented in a PDF document [PDF]