https://www.epo.org/en/service-support/faq/searching-patents/asian-patent-information/chinese-taipei/after-grant/when-do-i

When do I have to pay annual fees in Chinese Taipei?

The annual fee for the year in which the Taiwanese patent is granted must be paid on the publication date. Subsequent annual fees are due yearly in advance. The annual fees for several years may be paid in a lump sum.

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