Vespa was founded April 23, 1946.
"On 23 April 1946, at 12 o'clock in the central office for inventions, models and makes of the Ministry of Industry and Commerce in Florence, Piaggio e C. S.p.A. took out a patent for a 'motorcycle of a rational complexity of organs and elements combined with a frame with mudguards and a casing covering the whole mechanical part.'" Wikipedia.