Lincoln's Patent

Abraham Lincoln was the first and only president to be granted a patent. His invention, "A Device for Buoying Vessels Over Shoals," filed March 10, 1849, and granted a patent in June of the the same year,was not all that pratical a device, and was never put into use.

Model of Lincoln's Patent, currently in the collection of the National Museum of American History.

Click to view a PDF of Lincoln's Patent