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

Take the survey


Patent information services for experts

The EPO's patent information services for experts are a suite of browser-based products offering the kind of advanced search options that experienced patent searchers need.

Direct access

Access patent information services for experts with a secure HTTPS connection

Getting started

Quick Navigation