Did Ray Bradbury invent the typical 1950's sci fi characters?

Film historian Bill Warren stated in his book KEEP WATCHING THE SKIES!! that with IT CAME FROM OUTER SPACE, Ray Bradbury invented what was to become the sterotype 1950's SCi Fi character. He states that the character of John Putnam was the model for the scientist character in many later films to come. Prior to IT CAME FROM OUTER SPACE sci fi movie characters were patterned after War movies, think of the characters in THE LOST CONTINENT (1951) and ROCKETSHIP XM (1950) FLIGHT TO MARS (1951) THE THING (1951). Then think of how many films made after IT CAME FROM OUTER SPACE featured a loner scientist who is aware of the menace before everybody else and is not at first believed. What do you think?