What is WIPO Standard ST.3 and how is it used in patent document identification?

WIPO Standard ST.3 is a crucial resource for identifying the origin of patent documents. According to MPEP 1851: “The two-letter country codes are set forth in WIPO Standard ST.3, which is published in the ‘WIPO Handbook on Industrial Property Information and Documentation’ and is accessible via the Internet at the WIPO website.” This standard provides…

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