National Comics Publications v. Fawcett Publications, 191 F.2d 594 (2d Cir. 1951), was a decision by the United States Court of Appeals for the Second Circuit in a twelve-year legal battle between National Comics and the Fawcett Comics division of Fawcett Publications, concerning Fawcett's Captain Marvel character being an infringement on the copyright of DC's Superman comic book character. The litigation is notable as one of the longest running legal battles in comic book publication history.