5 major inventions and innovations of the 1920s July 8, 2019 16 32 64 128 5 major inventions and innovations of the 1920s quizlet 5 major inventions of the 1920s 5 major inventions and innovations events of the 1920s 5 major inventions events of the 1920s Best inventions of the 20th century Invention that changed the world Timeline of inventions that changed the world