Presidential Invention
Updated July 24, 2020 |
Infoplease Staff
The Question:
Who was the only U.S. president to have a patent on an invention? What was the invention?
The Answer:
On May 22, 1849 Abraham Lincoln was granted U.S. Patent No. 6,469 "A Device for Buoying Vessels over Shoals."
Here is a link to the patent of his invention.
-The Editors
See also:
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