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Émile Girardeau (12 October 1882 – 7 December 1970) was a French engineer, famous for being the first person to patent the original system of frequencies that is used and known today as radar. He was born in 1882 at Luçon, France (the Vendée).
In his early life he attended the École Polytechnique (Polytechnic School) (1902-1908) and became the Instructor at the École nationale des ponts et chaussées (National School of Bridges and Roads). By 1910, Girardeau established the first radiotelegraphic radio connection in tropical countries with Joseph Béthenod. The radio connection systems were designed for the Radioelectric French Company.
In 1919, Girardeau was promoted to Chevalier of the Legion of Honour for services in war. In 1922, Girardeau set in motion the idea for the creation of a public utility of information and music. Also in 1922, Girardeau helped establish the first private radio station in France, called RADIOLA, which at the end of March 1929 became Radio Paris. In 1931, Girardeau was promoted to Commander of the Legion of Honour.
In 1934, Girardeau headed the team which developed the first radar system in France. In 1939, Girardeau built with Maurice Ponte radar installations for the defence of Paris against planes (which were destroyed in June 1940). After the fall of France to Germany, Girardeau created a factory for underground forces of free France.
In 1944, Girardeau re-established radio communications in France. In 1945, Girardeau became a member of the Académie navale. In 1954, Girardeau became a member of the Académie des sciences morales et politiques. In 1970, Girardeau died in Paris.
The Académie Julian was a private art school for painting and sculpture founded in Paris, France, in 1867 by French painter and teacher Rodolphe Julian (1839–1907) that was active from 1868 through 1968. It remained famous for the number and quality of artists who attended during the great period of effervescence in the arts in the early twentieth century. After 1968, it integrated with ESAG Penninghen.
Michel Jules Alfred Bréal, French philologist, was born at Landau in Rhenish Palatinate. He is often identified as a founder of modern semantics.
The ENSTA Paris, also known as the École nationale supérieure de techniques avancées is a prestigious French graduate school of engineering. Founded in 1741, it is the oldest "grande école" in France. It is located in Palaiseau in the south of Paris, on the Paris-Saclay campus, and is a constituent faculty of the Polytechnic Institute of Paris. Every year some 180 engineers graduate from the school.
Paul-Albert Besnard was a French painter and printmaker.
Léon Joseph Florentin Bonnat was a French painter, Grand Officer of the Légion d'honneur and professor at the Ecole des Beaux Arts.
Sir Gaston Camille Charles Maspero was a French Egyptologist known for popularizing the term "Sea Peoples" in an 1881 paper.
Émile Friant was a French artist.
Jean Léon Marie Delumeau was a French historian specializing in the history of the Catholic Church, and author of several books regarding the subject. He held the Chair of the History of Religious Mentalities (1975–1994) at the Collège de France and was a member of the Académie des inscriptions et belles-lettres.
René Worms was a French auditor of the council of state. He was the son of professor of political economics, Émile Worms.
Charles Hermite FRS FRSE MIAS was a French mathematician who did research concerning number theory, quadratic forms, invariant theory, orthogonal polynomials, elliptic functions, and algebra.
Camille Papin Tissot was a French naval officer and pioneer of wireless telegraphy who established the first French operational radio connections at sea.
Henri Paul Royer was a French painter, remembered especially for his genre works from Brittany.
Jean François Chazy was a French mathematician and astronomer.
Jules-Joseph Guiffrey was a 19th-century French art historian, a member of the Académie des beaux-arts.
Émile Mireaux was a French economist, journalist, politician and literary historian. In the 1930s he edited Le Temps and contributed to other right-leaning journals. He became a senator in 1936, and briefly served as a minister in 1940. From 1940 until his death he held a chair in political economy, statistics and finance at the Académie des Sciences Morales et Politiques.
The Compagnie générale de la télégraphie sans fil was a French company founded in 1918 during a reorganization and expansion of the Société française radio-électrique (SFR), which became a subsidiary. The company developed technology for radio-telegraphy, radio program transmission, radar, television and other applications. It provided broadcasting and telegraphy services, and sold its equipment throughout the French colonial empire and in many other parts of the world. In 1968 CSF merged with the Thomson-Brandt to form Thomson-CSF.

Joseph Bethenod was a French electrical engineer and inventor best known for his inventions in the field of radio transmission, but interested in a wide variety of topics including electric motors and automobile technology.

Camille Gutton was a French physicist who specialized in radioelectricity. He was responsible for various theoretical and practical advances. He followed some false leads such as research into the hypothetical N rays, which did not in fact exist, and attempts to explain anomalies in laboratory measurements of radio waves in ionized gases, which he thought might be due to positive ions exerting a quasi-elastic force on electrons. His work on very high frequency radio waves helped with the development of radar. He received various honours for his work, and in 1947 was a candidate for the Nobel Prize in Physics.

Georges Vésier was a French engineer who for many years headed the Compagnie française des métaux, a major metallurgy company in France specializing in copper and aluminum products.
Ernest Victor Hareux was a French painter of landscapes and genre scenes.