Definition of LETTERS PATENT • Law Dictionary • TheLaw.com

The name of an instrument granted by the government to convey a right to the patentee; as, a patent for a tract of land; or to secure to him a right which he already possesses, as a patent for a new invention or discovery; Letters patent are a matter of record. They are so called because they are not sealed up, but are granted open. Vide Patent.

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