It turns out that Abe does hold a patent: http://www.google.com/patents/US6469 http://www.google.com/patents/US6469 But it's patent #6469 for "A Device for Bu

It turns out that Abe does hold a patent: http://www.google.com/patents/US6469 http://www.google.com/patents/US6469 But it's patent #6469 for "A Device for Buoying Vessels Over Shoals" There are other Lincolns in the patent database, but none of them appear to have a patent for Facebook: https://www.google.com/search?q=ininventor:%22ABRAHAM+LINCOLN%22&hl=en&tbm=pts&ei=VXepT8e4C8XXtgfmwonGDw&start=10&sa=N https://www.google.com/search?q=ininventor:%22ABRAHAM+LINCOL... I guess it does say that this patent was rejected, but this does seem somewhat suspicious that there are no records of it to be found.