37. He’s The Only President To Hold A Patent
Before Abraham Lincoln became president in 1861, he received a patent for his invention, Buoying Vessels Over Shoals. The device would equip boats with inflatable bellows, improving the boat’s navigation system in shallow waters. Lincoln received the patent on May 22, 1849, but the Buoying Vessels Over Shoals invention would never become manufactured. But even so, Abraham Lincoln remains the only President of the United States of America to own a patent while in office.