12. He is the only U.S. president to hold a patent. As a young man, Lincoln obtained a patent for a device designed to lift ships over shoals (shallow water). The device was never put into production or used.
12. He is the only U.S. president to hold a patent. As a young man, Lincoln obtained a patent for a device designed to lift ships over shoals (shallow water). The device was never put into production or used.