| Les PĂ©rils de Pauline | 1914 | Writer |
| The Exploits of Elaine | 1914 | Screenplay |
| The New Exploits of Elaine | 1915 | Writer |
| The Romance of Elaine | 1915 | Writer |
| Beatrice Fairfax | 1916 | Screenplay |
| The Right Way | 1921 | Writer |
| Welcome to Our City | 1922 | Writer |
| In Search of a Thrill | 1923 | Screenplay |
| The Frontier Trail | 1926 | Screenplay |
| The Border Cavalier | 1927 | Screenplay |
| Wolf's Trail | 1927 | Screenplay |
| The Fearless Rider | 1928 | Writer |
| Thunder Riders | 1928 | Screenplay |
| Guardians of the Wild | 1928 | Writer |
| Jungle Mystery | 1932 | Screenplay |
| The Secrets of Wu Sin | 1932 | Writer |
| Clancy of the Mounted | 1933 | Writer |
| The Phantom of the Air | 1933 | Screenplay |
| Tarzan l'intrépide | 1933 | Writer |
| Perils of Pauline | 1933 | Screenplay |
| Pirate Treasure | 1934 | Screenplay |
| The Vanishing Shadow | 1934 | Screenplay |
| The Red Rider | 1934 | Screenplay |
| Rustlers of Red Dog | 1935 | Screenplay |
| The Call of the Savage | 1935 | Writer |
| Les nouvelles aventures de Tarzan | 1935 | Screenplay |
| The Roaring West | 1935 | Writer |
| Flash Gordon | 1936 | Screenplay |
| The Phantom Rider | 1936 | Screenplay |
| Law and Lead | 1936 | Screenplay |
| The Phantom of the Range | 1936 | Screenplay |
| Blake of Scotland Yard | 1937 | Screenplay |
| Blake of Scotland Yard | 1937 | Screenplay |
| Cheyenne Rides Again | 1937 | Screenplay |
| The Feud of the Trail | 1937 | Screenplay |
| Mystery Range | 1937 | Screenplay |
| Orphan of the Pecos | 1937 | Writer |
| Flying Fists | 1937 | Screenplay |
| Lost Ranch | 1937 | Screenplay |
| Million Dollar Racket | 1937 | Screenplay |
| Sky Racket | 1937 | Screenplay |
| Amateur Crook | 1937 | Screenplay |
| Rocket Ship | 1938 | Screenplay |
| Flaming Frontiers | 1938 | Screenplay |
| Zorro, l'Araignée contre la Pieuvre | 1938 | Screenplay |
| The Phantom Creeps | 1939 | Screenplay |
| Scouts to the Rescue | 1939 | Screenplay |
| Flying G-Men | 1939 | Screenplay |
| Outlaws' Paradise | 1939 | Screenplay |
| Mandrake the Magician | 1939 | Screenplay |
| The Oregon Trail | 1939 | Screenplay |
| Straight Shooter | 1939 | Screenplay |
| Trigger Fingers | 1939 | Screenplay |
| Mandrake the Magician | 1940 | Screenplay |
| The Green Hornet | 1940 | Screenplay |
| FLASH GORDON CONQUĂTE DE L'UNIVERS | 1940 | Screenplay |
| Winners of the West | 1940 | Screenplay |
| Dead End Kids vs. Spies, Inc. | 1940 | Writer |
| Junior G-Men | 1940 | Writer |
| The Green Hornet Strikes Again! | 1940 | Screenplay |
| Les justiciers du désert | 1941 | Screenplay |
| The Iron Claw | 1941 | Screenplay |
| Holt of the Secret Service | 1941 | Screenplay |
| Perils of the Royal Mounted | 1942 | Screenplay |
| The Secret Code | 1942 | Screenplay |
| Daredevils of the West | 1943 | Screenplay |
| Secret Service In Darkest Africa | 1943 | Writer |
| The Masked Marvel | 1943 | Screenplay |
| Captain America | 1944 | Screenplay |
| Haunted Harbor | 1944 | Screenplay |
| Zorro et la femme au masque noir | 1944 | Screenplay |
| Manhunt of Mystery Island | 1945 | Screenplay |
| Federal Operator 99 | 1945 | Screenplay |
| The Purple Monster Strikes | 1945 | Screenplay |
| The Phantom Rider | 1946 | Screenplay |
| King of the Forest Rangers | 1946 | Screenplay |
| Daughter of Don Q | 1946 | Screenplay |
| The Crimson Ghost | 1946 | Screenplay |
| Son of Zorro | 1947 | Screenplay |
| Jesse James Rides Again | 1947 | Screenplay |
| Dangers of the Canadian Mounted | 1948 | Screenplay |
| G-Men Never Forget | 1948 | Screenplay |
| The Rangers Ride | 1948 | Screenplay |
| Adventures of Frank and Jesse James | 1948 | Screenplay |
| Federal Agents vs. Underworld, Inc. | 1949 | Screenplay |
| Gun Law Justice | 1949 | Screenplay |
| Brand of Fear | 1949 | Screenplay |
| Lawless Code | 1949 | Screenplay |
| Savage Fury | 1956 | Writer |
| Sakima and the Masked Marvel | 1966 | Screenplay |
| D-Day on Mars | 1966 | Screenplay |
| Purple Death from Outer Space | 1966 | Writer |
