Doc Savage is a fictional pulp character created by Street and Smith Publications in the 1930's.
Written by Lester Dent, who sometimes went under the pseudonymn Kenneth Robeson.
Doc was a "superhero" who went on adventures accompanied by his "Fabulous Five" partners.
His first appearance was in Doc Savage Magazine #1 (Mar. 1933). Superman didn't appear
until 1938, so it's reasonable to assume that Doc was an inspiration to the creators of
the Man of Steel. (Man of Bronze....Man of Steel...hmm).
Doc Savage's real name was Clark Savage, Jr. He was a physician, surgeon, scientist,
adventurer, inventor, explorer, researcher, and, as revealed in The Polar Treasure, a musician. A team of scientists assembled by his father deliberately trained his mind and body to near-superhuman abilities almost from birth, giving him great strength and endurance, a photographic memory, a mastery of the martial arts, and vast knowledge of the sciences.