https://www.epo.org/en/service-support/faq/searching-patents/asian-patent-information/korea/filing-grant/can-i-request-my

Can I request that my application in Korea be published earlier than 18 months from the filing (or earliest priority) date?

Yes, it has been possible to do this since 1 July 1996. However, if you file a provisional application, earlier publication is possible only after submitting the complete set of claims.

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