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INPADOCDB/INPAFAMDB: Enhancements to the US national patent classification

27. October 2010

The issued US national patent classification (NCL) is available for 6 million US applications in the INPADOC databases back to 1968. The NCL codes have now been standardized according to STN-standard rules and a NCL-thesaurus has been introduced to support patent classification searching. In addition, the Locarno classification for US design patents (US S1) is provided in separate search and display fields. The US classification enhancements greatly support the retrieval of US patent publications in the INPADOC files.

For further details and search examples see: