On November 4, 1862, Richard Gatling received a patent for the machine gun.
Richard Jordan Gatling (September 12, 1818 – February 26, 1903) was an American inventor best known for his invention of the Gatling gun, the first successful machine gun.
Publication number: US36836 A
Patent Title: Improvement in revolving battery-guns
Publication type: Grant
Publication date: 4 Nov 1862
Inventors: Richaed J. Gatling