Abraham Lincoln: Inventor (Pathfinder Magazine, 1940)
There, to a coterie of Lincoln addicts on Abe’s 131st birthday, U.S. Patent Commissioner Conway P. Coe displayed a model of a device Lincoln patented in 1849, when he was still an unknown congressman from Illinois. Commissioner Coe read the patent application, in Lincoln’s own handwriting, for a gadget to float flatboats in shallow water.
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