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Today in History: May 22

Microsoft News | Slide 1 of 15: circa 1860: A design for a floating river boat for use in shallow waters devised by Abraham Lincoln, the 16th President of the United States. (Photo by Three Lions/Getty Images)

1849: Abraham Lincoln receives a patent

Lincoln patented a flotation device to lift riverboats stuck on sandbars. The idea never turned into reality but he remains the only U.S. president to hold a patent.

© Three Lions/Getty Images
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