Mort Weisinger
Mort Weisinger is credited as writer on 65 issues in grailworth's catalog, 61 issues of them across 17 series we value. Characters first seen in issues they wrote or drew include Tarantula, John Pemberton, Gloria Pemberton and Captain X.
Characters they introduced
Every issue
Batman (1940) 2 issues
Detective Comics (1937) 3 issues
House of Mystery (1951) 1 issue
Justice League of America (1960) 1 issue
Leading Comics (1941) 2 issues
Secret Origins (1973) 2 issues
Showcase (1956) 1 issue
Slam-Bang Comics (1940) 1 issue
Star Spangled Comics (1941) 2 issues
Strange Adventures (1950) 4 issues
Superman (1939) 1 issue
World's Finest Comics (1941) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.