| 1920 JULIUS FRECSKA Aerial Torpedo Patent Print |
| 1920 KOHLER Torpedo Capturing Destroy Net Patent 22567 |
| 1920 DEL SOLAR Torpedo Director Patent Print Art |
| 1920 GEORGE A STRICKER Torpedo Holder Patent |
| 1920 FAHRENHOLZ MARTIN Aerial Torpedo Patent |
| 1920 ALLA STARR Torpedo Guard Patent Print Art |
| 1920 EDWARD GRAHAM Land Torpedo Patent Print Art |
| 1920 STANLEY CHARLES Torpedo Holder Patent Print |
| 1920 ALLA Torpedo Guard Patent Print Art |
| 1920 EUSEBI NAZZARENO Torpedo Defense Patent |
| 1920 HUTCHINSON Torpedo Planting Device Patent |
| 1920 KOSTANTYN Torpedo Guard Patent Print Art |
| 1920 O'CONNOR WILLIAM Aerial Torpedo Patent |
| 1920 HAMMOND Torpedo Emergency Launch Patent 22408 |
| 1920 CHARLES Automobile Torpedo Patent Print Art |
| 1920 CUTTER WILLIAM Torpedo Boat Patent Print |
| 1920 DATHAN Torpedo Net For Ships Patent Print |
| 1920 ZIGMOND FRECSKA Aerial Torpedo Patent Print |
| 1920 ROY KLISE Aerial Torpedo Patent Print Art |
| 1920 AUGUSTUS Aero Submarine Torpedo Patent |
| 1920 KOSTANTYN BABECKI Torpedo Guard Patent |
| 1920 EDGAR LEES Automobile Torpedo Patent Print |
| 1920 HAMMOND MASTERS Torpedo Trap Patent Print |
| 1920 ALFRED R SHRIGLEY Torpedo Director Patent |
| 1920 SHEARER WILLIAM Torpedo Boat Patent Print |
| 1920 SHONNARD Automobile Torpedo Patent Print |
| 1920 PATRICK THOMAS Aerial Torpedo Patent Print |
| 1920 STEVENS CHARLES Aerial Torpedo Patent Print |
| 1920 DUNIGAN ALFRED Torpedo Guard Patent Print |
| 1920 EUSEBI Torpedo Defense Patent Print Art |
| 1920 THOMPSON OLIVER Torpedo Guard Patent Print |
| 1920 THOMPSON Torpedo Guard Patent Print Art |
| 1920 FRYER Torpedo For Shcoting Oil Wells Patent |
| 1920 CUTTER Torpedo Boat Patent Print Art |