In 1919 Philipson became the president of the Pistoia section of the National Combatants and Veterans Association.[1] The same year he was elected as a deputy from Florence on the list called Liberal Concentration.[3] In the 1921 elections he was also elected to the Parliament from the National Bloc.[1] Later he joined the Liberal Democratic Union.[1] When the Kingdom of Italy totally became under the Fascist rule from 1922 Philipson left the country for Paris, France.[1] There he had connections with the liberal and moderate anti-Fascism movements.[1]
Philipson returned to Italy in the mid-1930s. He and Eugenio Coloroni were arrested by the OVRA (Italian secret police) in October 1938.[4] Philipson detained in the Tremiti Islands for three years and then, was transferred to Sala Consilina and Eboli in southern Campania.[1] After the fall of the Fascist rule he was freed and was appointed undersecretary to Prime Minister Pietro Badoglio in February 1944,[5] but his term was very brief and ended in April 1944.[6] Next Philipson was appointed member of the National Council, the forerunner of the Italian Parliament.[1] He retired from politics and devoted himself to his legal profession and freemasonry.[1]
Philipson died in Pistoia in 1972.[1]