A grant made by a government that confers upon the creator of an invention the sole right to make, use, and sell that invention for a set period of time. Letters patent. An invention protected by such a grant. A grant made by a government that confers on an individual fee-simple title to public lands. The official document of such a grant. The land so granted. An exclusive right or title. Protected or conferred by a patent or letters patent: a patent right. Of, relating to, or dealing in patents: patent law. Obvious; plain. See Synonyms at apparent. Biology Not blocked; open. Biology Spreading open; expanded. Of, relating to, or being a nonprescription drug or other medical preparation that is often protected by a trademark. Of high quality. Used of flour. Archaic Open to general inspection. Used especially of documents. To obtain a patent on or for (an invention, for example). To invent, originate, or be the proprietor of (an idea, for example). To grant a patent to or for.