His inventions include the 819 line French standard and the SECAM color system.

On December 6, 1931, De France founded the Compagnie Générale de Télévision in Le Havre, making television sets with a vertical definition of 60 lines.

In February 1932, De France made several transmissions over a distance of 7 km from the "Radio-Normandie" station in Fécamp.

On October 1, 1967 at 2:15pm CET, la deuxième chaîne switched from black and white to color using SECAM.

De France is interred in Paris (cimetière du Montparnasse).