First to file and first to invent

First to file and first to invent are legal concepts that define who has the right to the grant of a patent for an invention. Since 16 March 2013, after the USA abandoned its "first to invent/document" system, all countries have operated under the "first-to-file" patent priority requirement.^[1]

^ Zach Carter (11 June 2011). "Patent Reform Refuses To Die, Congress Keeps Cashing In". The Huffington Post. Retrieved 31 July 2013.

[1] Zach Carter (11 June 2011). "Patent Reform Refuses To Die, Congress Keeps Cashing In". The Huffington Post. Retrieved 31 July 2013.

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