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http://www.epo.org/service-support/availability-of-online-services/2022/20220401.html Content reproduced from the Website of the European Patent Office as permitted by their terms of use. Due to technical maintenance work, the following online services will not be available between 19.00 and 19.30 hrs CET on Monday, 4 March 2022: Espacenet Classic Espacenet Open Patent Service We apologise for... Continue reading