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Are you familiar with Y02/Y04S?

If you are a user of the Y02/Y04S classification scheme for climate change mitigation technologies, we invite you to participate in a short survey. It will only take a few minutes of your time and your answers will help us to improve the scheme further.
You can complete the survey in English, German or French language

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About GPI

The EPO's advanced online patent search tool


GPI user manual V2.3 (PDF, 1.9 MB)

GPI introductory guide (PDF, 468 KB)

You can use Global patent index (GPI) to carry out low-cost, expert searches on the state of the art and legal issues.

You can also use it to gather competitive intelligence, for example by performing competitor/technology watches and basic statistical analyses.

Special features

  • Choose your preferred language for the user interface, which is available in English, French, German, Spanish and Japanese
  • Perform your searches in a secure https environment
  • Make use of over 100 search criteria covering indexed bibliographic data, citations, national and international classifications, legal status and more
  • Display the bibliographic data, citations, classifications, legal status, patent family (simple and extended) and representative image
  • Directly access the full original patent documents, mosaics and CPC codes via hyperlinks to Espacenet
  • Machine-translate the retrieved titles and abstracts
  • Save your search queries (e.g. for patent watches)
  • Customise your result list and document content in different display and download formats
  • Visualise your search results (e.g. competitor and technological trends)

Coverage and updates

Global patent index is based on the EPO's DocDB bibliographic worldwide patent database collection and INPADOC worldwide legal status database. It is updated weekly, on Fridays at 12.00 hrs CET.

Test GPI

Test GPI free of charge for two months

Your opinion is valuable to us!

Take part in our survey at the end of the GPI test period. This will help us to make sure that GPI evolves in the right way in the future.

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