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These tables provide details of the patents covered in Derwent World Patents Index.

In the DWPI Coverage tables, the latest publication date is provided for each kind of patent included in that update. This does not necessarily include all documents for that publication date: some may have been included in earlier updates, and some may appear in future updates. The number of patent records for each publication kind is the total of new, edited, amended and corrected records included in the update.


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