Detective Comics #28 - National Allied Publications Feature Comics (previously Feature Funnies) #21 - Quality Comics More Fun Comics #44 - National Periodical Publications Movie Comics #3 - National Periodical Publications Superman (1939 series) #1, cover dated Summer - National Periodical Publications July Ace Comics #28 - David McKay Publications Action Comics #14 - National Allied Publications Adventure Comics #40 - National Allied Publications. In this issue Gardner Fox, Bert Christman, Ogden Whitney and Creig Flessel's The Sandman makes his debut. All-American Comics #4 - All-American Publications Amazing Mystery Funnies #11 - Centaur Publications Detective Comics #29 - National Allied Publications. In this issue Gardner Fox introduces Batman's utility belt in Batman by Bill Finger and Bob Kane. Feature Comics #22 - Quality Comics More Fun Comics #45 - National Periodical Publications Movie Comics #4 - National Periodical Publications The Magic Comic #1 - D. C. Thomson & Co. In Wonderworld Comics #3 Will Eisner and Jerry Iger's The Flame makes his debut. August Ace Comics #29 - David McKay Publications Action Comics #15 - National Allied Publications Adventure Comics #41 - National Allied Publications All-American Comics #5 - All-American Publications Amazing Mystery Funnies #12 - Centaur Publications Detective Comics #30 - National Allied Publications Feature Comics #23 - Quality Comics More Fun Comics #46 - National Periodical Publications Movie Comics #5 - National Periodical Publications Mystery Men Comics #1 (1939 series) - Fox Feature Syndicate - First appearance of Blue Beetle Smash Comics #1 (1939 series) - Quality Comics September Newspaper strip Ben Bowyang by Alex Gurney begins publication Ace Comics #30 - David McKay Publications Action Comics #16 - National Allied Publications Adventure Comics #42 - National Allied Publications All-American Comics #6 - All-American Publications Amazing Man Comics (1939 series) #5 - Centaur Publications Amazing Mystery Funnies #13 - Centaur Publications Detective Comics #31 - National Allied Publications. In this issue Gardner Fox introduces the Batarang in Batman by Bob Kane and Bill Finger. Feature Comics #24 - Quality Comics Four Color Series 1 (1939 series) #1 - Dell Publishing First comic-book appearance of Dick Tracy, who was already a popular feature in newspaper comics since 1931. More Fun Comics #47 - National Periodical Publications Movie Comics #6, last issue - National Periodical Publications Mutt and Jeff (1939 series) #1 - National Periodical Publications Mystery Men Comics #2 - Fox Feature Syndicate Smash Comics #2 - Quality Comics