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Keywords: Lincoln patent drawings.jpg en Abraham Lincoln patent of buoying vessels over shoals issued May 22 1849 US Patent 6469 as found http //www google com/patents id ajRFAAAAEBAJ pg PA2 dq Abraham+Lincoln+patent hl en sa X ei yz_zTumwLqjv0gGTmsiaAg ved 0CDYQ6AEwAQ v onepage q Abraham 20Lincoln 20patent f false here on Google Patents invented by Abraham Lincoln Issued by United States government Patent Office PD-USGov Uploaded with UploadWizard Patent drawings |