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First to file and first to invent
open-in-new
<p>First to file and first to invent are legal concepts that define who has the right to the grant of a <a href="/facts/Patent/LjT2bG3A">patent</a> for an <a href="/facts/Invention/P3LdUHBY">invention</a>. Since March 16, 2013, after the United States abandoned its "first to invent/document" system, all countries have operated under the "first-to-file" patent priority requirement. </p>