[3] By 1929 Barthélemy had been made head of the new television research laboratory, created by Jean Le Duc at the request of Ernest Chamon, CEO of the Compagnie des Compteurs in Montrouge.

[7] Continuing his work under the auspices of Postes, télégraphes et téléphones (PTT), Barthélemy developed from December 1932 a new design at 60 lines definition and produced an experimental program in black and white of one hour per week, "Paris Télévision".

It was a twenty-minute sequence in which the actress Béatrice Bretty read a text recounting her recent tour of Italy: Radio-PTT Vision, the first French television channel, was born.

René Barthélemy, by then a member of the Académie des sciences, despite poor health, continued to work effectively in the field of television, bringing to it his inventiveness, and undertook systematic research to detect the radiation discovered by the inventor Marcel Violet and to determine that its frequency is in a range beyond 1024 .

Despite his recommendation to develop a broadcasting network at 1045 lines, it was the 819 standard achieved by Henri de France which was adopted by the Minister of Information François Mitterrand.