comic book history
When Batman was first written, one name was attached to his creation: Bob Kane. Bob's name appeared in every Batman comic, without any other creator noted. However, this is not true. Bill Finger, a Depression-era, New York resident, had a lot to do with it, too. In fact, according to Marc Tyler Nobleman's breakthrough biography Bill the Boy Wonder: The Secret Co-Creator of Batman, Bill was responsible for the majority of the Batman persona we see today.
It's a bird . . . it's a plane . . . it's Siegel and Shuster!