DWPI Coverage Tables

The content in DWPITM is updated regularly and records are kept of all updates made. In the DWPI coverage table below 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.

Archive 2019
Archive 2020
Archive 2021
Archive 2022


DWPI Update Dates

Dates of data loaded into STN from 1994 to present

Other update news

2015 Revision To DWPI Non-Structural Fragmentation Codes

Chinese dual filings are now linked within DWPI families