Country Coverage and Kind Codes

Derwent World Patents Index Coverage

Thomson Reuters takes data from 50 sources (48 patent-issuing authorities and 2 journal sources) to create Derwent World Patents Index® (DWPISM) — the world's most comprehensive collection of professionally abstracted and annotated patent documents.

DWPI now covers more than 25.9 million inventions (Basic Records/patent families) detailed in over 56.3 million patent documents (April 3 2014).

Enhance your understanding of DWPI coverage by downloading the PDFs below and discover:

  • An overview of the patenting processes of 48 patent-issuing authorities (and two journal sources) worldwide. If you need further information, please use the links to the individual Patent Office websites, as provided.
  • The extent to which Thomson Reuters covers patents from each patent-issuing authority.
  • Patent number and application number formats for Thomson Innovation and the key online hosts: Dialog, Questel and STN.

Download the free PDFs for each patent authority and journal source covered in DWPI below:

More Information

  • DWPI Coverage Summary - List of all kind codes and start dates in DWPI 305 KB, 12 pp, Updated 03/2014
  • WIPO Country Codes - List of all WIPO country short names and codes 209 KB, 7 pp, Updated 04/2012
  • INID Codes - List of International Agreed Numbers for the Identification of Data 74 KB, 3 pp, Updated 04/2012
  • Deleted DWPI Records- List of records deleted from DWPI 2,658 KB, To update 201425
  • Latest Updates — Latest country publication dates