| 1920 GEORGE DORFFEL Submarine Vessel Patent |
| 1920 WALTERS FRANK Submarine Armor Patent Print |
| 1920 FRANK MACHAVA Submarine Patent Print Art |
| 1920 GILBERT CO A C Toy Submarine Patent Print |
| 1920 LUNDSTROM ROY Toy Submarine Patent Print |
| 1920 JOSEPH KUHAJDA Submarine Vessel Patent |
| 1920 KENNEDY Submarine Patent Print Art |
| 1920 GILBERT ALFRED Toy Submarine Patent Print |
| 1920 COLLIER Submarine Patent Print Art |
| 1920 AUGUSTUS Aero Submarine Torpedo Patent |
| 1920 COLLIER WILLIAM Submarine Patent Print Art |
| 1920 ELECTRIC BOAT CO Submarine Vessel Patent |
| 1920 KENNEDY WILLIAM Submarine Patent Print Art |
| 1920 DOANE LEWIS Submarine Vessel Patent Print |
| 1920 WALTERS Submarine Armor Patent Print Art |
| 1920 DE WAELE Submarine Toy Patent Print Art |
| 1920 VICKERS LTD Submarine Mine Patent Print Art |
| 1920 OSCAR YANCEY Toy Submarine Patent Print Art |
| 1920 EWALD A FRITZE Submarine Boat Patent Print |
| 1920 GEORGE LOCKHART Submarine Patent Print Art |
| 1920 MONTAGUE Submarine Boat Patent Print Art |
| 1920 BRILL PHILIP Submarine Boat Patent Print |
| 1920 GEORGE Submarine Patent Print Art |
| 1920 EMANUELE ELIA Submarine Mine Patent Print |
| 1920 GEORGE Submarine Vessel Patent Print Art |