Fictional character history
Wonder Man's secret identity is Fred Carson. During an excursion to Tibet, an old monk bestows Carson with a ring that gave him the power to fight evil when the need arose.

Publication history
Wonder Man was created by Eisner for Victor Fox, an accountant who previously worked at DC Comics and wanted to get into the comic book business. Following Fox's instructions to create a Superman-type character, and using the pen name Willis, Eisner wrote and drew the first issue of Wonder Comics. Eisner protested the derivative nature of the character and story.

Lawsuit
DC Comics brought a copyright infringement lawsuit against Fox, due to the character's similarities to Superman. The case was brought to court in Detective Comics, Inc. v. Bruns Publications, Inc., 111 F.2d 432 (2d Cir. 1940), forcing Fox to drop the character after just one issue.

This was the first copyright lawsuit in comic book history and set a precedent for DC Comics' vigorous protection of its characters (see also National Comics Publications v. Fawcett Publications).

The dispute is depicted in disguised fashion in the semi-autobiographical graphic novel, The Dreamer.