Partly-printed DS, signed "James Monroe" as president and "John Quincy Adams" as secretary of state, one page, 11.5 x 15, April 28, 1818. A patent issued to John L. Sullivan for a "useful improvement…in the mode of propelling ships and other Sea Vessels by Paddles as an Improvement on the Paddles for propelling all kinds of Vessels and boats." Signed at the conclusion by President James Monroe, Secretary of State John Quincy Adams, and Attorney General William Wirt. Impressively mounted, suede-matted, and framed with two portraits to an overall size of 42 x 26. In very good condition, with areas of thin vellum, and the seal missing; Adams's signature is light but legible, and Monroe's signature quite bold.
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