| 1921 SCHNEIDER CIE Recoil Brake Guns Art Print |
| 1921 WARREN Sighting Gear For Guns Patent Print |
| 1921 LEFEVER CHARLES Magazine For Guns Patent |
| 1921 GREEN Shoulder Rest For Guns Patent Print |
| 1921 BUMP Gun Stock Rifles Guns Small Arms Art |
| 1921 KRUPP AG Foundation For Guns Patent Print |
| 1921 BUTLER Tripod For Machine Guns Patent Print |
| 1921 FESSENDEN Destroy Enemy Guns SIGNAL Patent 22377 |
| 1921 FARR Loading Feed Belts Machine Guns Art |
| 1921 KEERAN Front Sight For Guns Patent Print |
| 1921 ALFRED Foundation For Guns Patent Print Art |
| 1921 HARRY Cartridge Small Arms Machine Guns Like |
| 1921 ALBERT Sighting Firearms Particularly Machine Guns |
| 1921 ARMSTRONG WHITWORTH ENG Sighting Gear Guns |
| 1921 TATTNALL Mechanism Non Recoil Breech Loading Guns |
| 1921 DAISY MFG COMPANY Magazine For Guns Patent |
| 1921 JOHN Semi Automatic Breech Mechanism Guns |
| 1921 ELBERT Trigger Sear Mechanism Machine Guns |
| 1921 NEWTON D BAKER Tripod Machine Guns Art |
| 1921 EUGENE Stock Single Barreled Double Barreled Guns |
| 1921 C C WILLIAMS Gun Stock Rifles Guns Small Arms |
| 1921 SMITH Extension Slide Handle Guns Art Print |
| 1921 HERBERT Ejector Mechanism Drop Down Guns |
| 1921 OLNEY Training Troops In Pointing Guns Art |
| 1921 JOHN WHITE Ejector Mechanism Drop Down Guns |
| 1921 HOLMES Recoil Mechanism For Guns Patent |
| 1921 NEWTON D BAKER Recoil Mechanism Guns Art |
| 1921 EUGENE Recoil Brake For Guns Patent Print |
| 1921 WALTER Means Preventing Jamming Machine Guns |