Owing to technical maintenance, the Third-party observations online service will be temporarily unavailable on Saturday, 10 April 2021 between 08.00 and 12.00 hrs CET.
We apologise for any inconvenience.
PATLIB2021
How to apply for a patent
Get the latest issues delivered direct to your inbox
Coronavirus (COVID-19
Listen to our podcast
Calendar of events
Filing trends reveal impact of the pandemic
