The tourbillon was patented by Abraham-Louis Breguet
Hailed as the father of modern watchmaking, Abraham-Louis Breguet developed the tourbillon in 1795 and patented it on June 26, 1801. Although the patent has since expired, it remains one of Breguet's most beloved inventions.
Also see: Breguet creates royalty-worthy watches for Marie-Antoinette exhibition