Henry Bessemer patented a method of mass steel production in 1856.
James Watt improved on the steam engine with his own designed engine in 1781.
Louis Pasteur created the pasteurization process, which was named after him for his research during the 19th century.
Thomas Edison patented the first practical light bulb in 1879.
Eli Whitney created the cotton gin in 1793, and patented it the following year.