He founded the French Radio-electric company (Société Française Radio-Électrique) in 1910 under the presidency of Branly. His first achievement was the installation of a first "musical spark" post on the Eiffel Tower. He established with J. Béthenod the first radiotelegraph connection in tropical countries (Brazzaville-Loango). During the Great War, he was mobilized at the Central Establishment of Military Radiotelegraphy with Colonel Ferrié then was assigned in 1915 by General Joffre, to the training of air officers in the fields of radio electricity. With the war began the first studies by Bethenod on the use of triodes (electronic tubes) as generators of continuous waves. Between the two wars, he directed the French Radio-Electric Company (SFR) and the General Company of Wireless Telegraphy (CSF) created in 1918 and deals with markets in all the countries with which direct links by radiotelegraphy are to be set up . Initiator of the research center where, in 1934 the radar was invented, he participated in the foundation of the Luxembourg Radio Company. In 1939, he built the great Paris defense radar, which he had destroyed in 1940. In 1941, he built a factory in Algiers for radio equipment which would be of great service to the allies; in 1944, he was tasked with re-establishing radio links in liberated territories. Member of the Navy Academy in 1945, he became a member of the Academy of Moral and Political Sciences (1954). He wrote "Essay of Contribution to Social Peace", 1945; "Le radar, invention française", 1953; "The inspiring sea of poets", 1954; "Technical progress and the human personality", 1955; "The adventures of science", 1957; "Social Progress: Components and Integration", 1959. He has collaborated on numerous reviews.