| 1921 CURRIER JAMES Torpedo GOVERNMENT Patent |
| 1921 DAVENPORT Torpedo Placing Device Patent |
| 1921 DYE Radio Aerial Mechanical Torpedo Patent 22378 |
| 1921 JENSEN BEARLUNDD Torpedo Patent Print Art |
| 1921 CHARLES BLUM Torpedo Patent Print Art |
| 1921 FLINT JAMES Torpedo GOVERNMENT Patent Print |
| 1921 JOHNSON Aerial Torpedo Or Bomb Patent Print |
| 1921 FRANKLIN CLARENCE Railway Torpedo Patent |
| 1921 HUGO CENTERVALL Aerial Torpedo Patent Print |
| 1921 LUTHER BOESCH Torpedo US GOVERNMENT Patent |
| 1921 GOVERNMENT Torpedo Patent Print Art |
| 1921 US GOVERNMENT Torpedo Patent Print Art |
| 1921 SCHOOLEY Railway Signal Torpedo Patent |
| 1921 BRANDT EDMUND Torpedo Patent Print Art |
| 1921 MEADE Aerial Torpedo Or Mine Patent Print |
| 1921 JOEL DYE Radio Aerial Torpedo Patent Print |
| 1921 LLOYD GILES Aerial Torpedo Patent Print Art |
| 1921 ELEMER Hunting Automobile Torpedo Patent |
| 1921 JOSEPH Submarine Torpedo Boat Patent Print |
| 1921 HENRY Torpedo Guard Or Shield Patent Print |
| 1921 HORACE SODEAU Automobile Torpedo Patent |
| 1921 FRANK Railway Signal Torpedo Patent Print |