| The Whispering Shadow | 1933 | Screenplay |
| Border Caballero | 1936 | Writer |
| Secret Agent X-9 | 1937 | Screenplay |
| Wild West Days | 1937 | Screenplay |
| Tim Tyler's Luck | 1937 | Screenplay |
| Rocket Ship | 1938 | Screenplay |
| Flash Gordon's Trip to Mars | 1938 | Screenplay |
| Flash Gordon: The Deadly Ray From Mars | 1938 | Writer |
| Red Barry | 1938 | Screenplay |
| Mars Attacks the World | 1938 | Screenplay |
| Hawk of the Wilderness | 1938 | Screenplay |
| Buck Rogers | 1939 | Writer |
| Frontier Pony Express | 1939 | Screenplay |
| Boys' Reformatory | 1939 | Writer |
| Wall Street Cowboy | 1939 | Screenplay |
| Les Tambours De Fu Manchu | 1940 | Screenplay |
| Adventures of Red Ryder | 1940 | Screenplay |
| King of the Royal Mounted | 1940 | Screenplay |
| Le Mysterieux docteur Satan | 1940 | Screenplay |
| Adventures of Captain Marvel | 1941 | Screenplay |
| La fille de la jungle | 1941 | Screenplay |
| King of the Texas Rangers | 1941 | Screenplay |
| Perils of Nyoka | 1942 | Screenplay |
| The Sombrero Kid | 1942 | Writer |
| Outlaws of Pine Ridge | 1942 | Writer |
| The Sundown Kid | 1942 | Screenplay |
| Thundering Trails | 1943 | Screenplay |
| Dead Man's Gulch | 1943 | Screenplay |
| Carson City Cyclone | 1943 | Screenplay |
| Days of Old Cheyenne | 1943 | Screenplay |
| Fugitive from Sonora | 1943 | Screenplay |
| Bordertown Gun Fighters | 1943 | Screenplay |
| Black Hills Express | 1943 | Screenplay |
| The Man from the Rio Grande | 1943 | Writer |
| Death Valley Manhunt | 1943 | Screenplay |
| Les Tambours De Fu Manchu | 1943 | Screenplay |
| California Joe | 1943 | Screenplay |
| Mojave Firebrand | 1944 | Screenplay |
| Outlaws of Santa Fe | 1944 | Screenplay |
| San Antonio Kid | 1944 | Screenplay |
| Stagecoach to Monterey | 1944 | Writer |
| Sheriff of Sundown | 1944 | Screenplay |
| Vigilantes of Dodge City | 1944 | Screenplay |
| Sheriff of Las Vegas | 1944 | Screenplay |
| The Topeka Terror | 1945 | Screenplay |
| Corpus Christi Bandits | 1945 | Screenplay |
| Red River Renegades | 1946 | Screenplay |
| Buckaroo from Powder River | 1947 | Screenplay |
| Last Days of Boot Hill | 1947 | Screenplay |
| Slippy McGee | 1948 | Screenplay |
| Whirlwind Raiders | 1948 | Screenplay |
| Blazing Across the Pecos | 1948 | Screenplay |
| Daredevils of the Clouds | 1948 | Screenplay |
| Sundown in Santa Fe | 1948 | Writer |
| Rose of the Yukon | 1949 | Screenplay |
| Law of the Golden West | 1949 | Writer |
| South of Rio | 1949 | Writer |
| San Antone Ambush | 1949 | Writer |
| Squadron of Doom | 1949 | Screenplay |
| Unmasked | 1950 | Screenplay |
| Beyond the Purple Hills | 1950 | Writer |
| Indian Territory | 1950 | Writer |
| Gene Autry and the Mounties | 1951 | Writer |
| Texans Never Cry | 1951 | Writer |
| Whirlwind | 1951 | Writer |
| Night Stage to Galveston | 1952 | Writer |
| Apache Country | 1952 | Writer |
| La Belle du Montana | 1952 | Screenplay |
| Winning of the West | 1953 | Screenplay |
| Planet Outlaws | 1953 | Writer |
| Pack Train | 1953 | Screenplay |
| The Missouri Traveler | 1958 | Screenplay |
| Californie, terre nouvelle | 1959 | Screenplay |
| Buck Rogers | 1977 | Screenplay |
