Grandson of Abraham Louis Breguet.
Son and successor of Louis Antoine Breguet.
Trained in Switzerland.
Developed a Marine Chronometer for the French merchant navy.
Research on electricity applications. Invented recording instruments.
Improvement of the sympathetic pendulum with system to wind and set the watch and filing of the patent.
Invention of the electric telegraph.
Construction of urban electric clocks in particular for the city of Lyon.