On 22nd May 1849, Abraham Lincoln is issued a patent for his invention to lift boats over obstacles that may appear in rivers. He would later become the president of the United States which makes him the only US President to hold a patent.
On 22nd May 1849, Abraham Lincoln is issued a patent for his invention to lift boats over obstacles that may appear in rivers. He would later become the president of the United States which makes him the only US President to hold a patent.