[DOC] [TLE] Abraham Lincoln's patent - Wikipedia [PAR] Abraham Lincoln's patent is a patented invention to lift boats over shoals and 
obstructions in a river. It is the only United States patent ever registered to a 
President of the United ... Called "Buoying Vessels Over Shoals," Lincoln 
envisioned a system of ... He made speeches on inventions before he became 
president. He said... [DOC] [TLE] Ask Me A Trivia Question -- 2 -- - Discussion on Topix [PAR] Mar 27, 2012 ... He was the only president to obtain one of these; it was for a hydraulic device to 
lift ships over shoals. Reply . Report Abuse Judge it! [DOC] [TLE] Abraham Lincoln Is the Only President Ever to Have a Patent | History [PAR] Yet before he became the 16th president of the United States, Lincoln, who had a 
long ... worked, invented a flotation system for lifting riverboats stuck on sandbars. 
... his patent make the wooden model he submitted to the Patent Office "one of 
the ... 1849, for a device for "Buoying Vessels Over Shoals," when he was back in
... [DOC] [TLE] Abraham Lincoln's Patent - Abraham Lincoln Online [PAR] 6469 for a device to lift boats over shoals, an invention which was never 
manufactured. However, it eventually made him the only U.S. president to hold a 
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During the first period many schemes for canals were proposed but only a few of 
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He thought these could be a new element, but lacked ability to fully confirm his 
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mounted on a continuous belt system running out behind the ship, and ... struts 
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Question: He was the only president to obtain one of these; it was for a hydraulic device to lift ships over shoals
Answer: Patent