| 1921 JENKS BENJAMIN Firearm Attachment Patent |
| 1921 BROWNING JOHN Firearm Patent Print Art |
| 1921 EMIL P PIERSON Firearm Patent Print Art |
| 1921 ALEXANDER Automatic Firearm Patent Print |
| 1921 PETER MARTINO Firearm Patent Print Art |
| 1921 JOLIDON CHARLES Firearm Patent Print Art |
| 1921 SAVAGE ARMS CORP Firearm Patent Print Art |
| 1921 FORDYCE JOHN Firearm EMIL P PIERSON Patent |
| 1921 OLUF BUHL Firearm Patent Print Art |
| 1921 PEDERSEN JOHN Firearm Patent Print Art |
| 1921 LUDOVIC MARCQ Firearm Patent Print Art |
| 1921 NEWTON D BAKER Firearm Patent Print Art |
| 1921 REISING EUGENE Firearm Patent Print Art |
| 1921 GUSTAF SWEBILIUS Repeating Firearm Patent |
| 1921 US MACHINE GUN COMPANY Firearm Patent Print |
| 1921 SHEPPARD Automatic Firearm Patent Print Art |
| 1921 LOUIS BOURDELLES Automatic Firearm Patent |
| 1921 NELSON Gas Operated Firearm Patent Print |
| 1921 STAFFORD FRANCIS Firearm Patent Print Art |
| 1921 HUNTER ARMS COMPANY INC Firearm Patent |
| 1921 WERKE AG DEUTSCHE Firearm Patent Print Art |
| 1921 HARTFORD MACHINE GUN COMPANY Firearm Patent |
| 1921 ROSEBUSH Composite Automatic Firearm Patent |
| 1921 REMINGTON ARMS CO INC Firearm Patent Print |
| 1921 ROSEBUSH WALDO Firearm Patent Print Art |
| 1921 SEARLE Breech Loading Firearm Patent Print |
| 1921 BALL BENJAMIN Firearm NEWTON D BAKER Patent |