| 1920 EDWARD E GEORGE Bomb Patent Print Art |
| 1920 WARD Bomb Throwing Machine Patent Print Art |
| 1920 THOMAS FRANK Bomb Patent Print Art |
| 1920 SCHNEIDER CIE Projectile Bomb Throwers Art |
| 1920 KELLEY OREA Aerial Bomb Patent Print Art |
| 1920 ELWOOD COOK Aerial Bomb Patent Print Art |
| 1920 DI Self Propelling Aerial Bomb Patent Print |
| 1920 WALTER CHMIELARSKI Bomb Dropper Patent |
| 1920 WILLIAMS EDDIE Aerial Bomb Patent Print Art |
| 1920 EMILIO Bomb Thrower Bomb To Be Thrown Thereby |
| 1920 SPENCER THOMAS Bomb Thrower Patent Print |
| 1920 FRED Automatic Flying Machine Bomb Dropper |
| 1920 HARRY CLARY Bomb Patent Print Art |
| 1920 EDWARDS Aerial Bomb Launching Mechanism |
| 1920 EUGENE Projectile For Bomb Throwers Patent |
| 1920 MCINTYRE JOSEPH Aerial Bomb Patent Print |
| 1920 JOSEPH THOMAS REYNOLDS Aerial Bomb Patent |
| 1920 MAZUEL Airplane Bomb Sight Patent Print Art |
| 1920 SPENCER WILLIAM Bomb EDWARD E GEORGE Patent |
| 1920 GOVERNMENT Airplane Bomb Sight Patent Print |
| 1920 STODDARD Bomb Dropping Mechanism Patent |
| 1920 BUTLER Bomb Throwing Machine War Patent 22415 |