The EPO has recently obtained more Chinese search results patent citations (SEA) and non-patent literature citations (NPL). With these additions, the number of cited CN patent literature in our database increased to over 29 million and the number of non-patent literature (NPL) citations to over 3 million references.
Citations at the EPO are available through both versions of Espacenet for free access by the public, and also in EPO's paying or free tools and datasets like DOCDB, GPI, European Register, OPS in PATSTAT.
For more information on the coverage of the citation database (REFI), please consult the documents related to citations on this website: https://www.epo.org/searching-for-paten ... gular.html
Please write to patentdata(a)epo.org
This is where the EPO's data experts will post changes and information on our data.
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