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175th anniversary: Abraham Lincoln was issued a patent for an invention to lift boats over...

Wed, May 22, 2024

2 yr ago

Source

In 1849, Abraham Lincoln was issued a patent for an invention to lift boats over obstacles in a river, making him the only U.S. president ever to hold a patent.

Also on May 22, 2024

Source, method and history
Source
Wikipedia
How we know
Wikipedia "On this day" selected anniversary, 175 years (1849 to 2024).
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