https://www.epo.org/en/service-support/faq/applying-patent/reinforced-partnership-programme/general/how-does-partner
How does a partner office reuse EPO work products?
Partner offices reuse EPO work products in a standardised and streamlined manner. The reuse workflow is embedded in the established patent grant process and customised to the specific legal, procedural and operational requirements of each partner office.
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