How many movies have H.G. Wells and Russell A. Gausman collaborated on?

They have worked on 4 movies together! Their first movie together was The Invisible Man Returns (1940) while their highest rated movie together was Bud Abbott and Lou Costello Meet the Invisible Man (1951). They have not worked together since Bud Abbott and Lou Costello Meet the Invisible Man (1951). They are most known for their science fiction films together.