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 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 Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.
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