This one comes straight from epo patstat forum, you may find the original @ this link.
If you are in need of matching US Patend Classification (USPC in short) against IPC, there are some web pages in USPTO web site that may be useful:
USPC-to-IPC Reverse Concordance (entries are grouped by IPC notation, rather than USPC notation): http://www.uspto.gov/web/patents/classification/international/ipc/ipc8/ipc_concordance/ipcsel.htm
US-to-IPC Concordance Pages from Classification Home (by choosing US-to-IPC8 Concordance in the radio button) : http://www.uspto.gov/web/patents/classification/index.htm
For more details, see USPTO dedicated page:
http://www.uspto.gov/web/patents/classification/international.htm
If you are in need of matching US Patend Classification (USPC in short) against IPC, there are some web pages in USPTO web site that may be useful:
USPC-to-IPC Reverse Concordance (entries are grouped by IPC notation, rather than USPC notation): http://www.uspto.gov/web/patents/classification/international/ipc/ipc8/ipc_concordance/ipcsel.htm
US-to-IPC Concordance Pages from Classification Home (by choosing US-to-IPC8 Concordance in the radio button) : http://www.uspto.gov/web/patents/classification/index.htm
For more details, see USPTO dedicated page:
http://www.uspto.gov/web/patents/classification/international.htm
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