| 1930 ELECTRIC BOAT CO Mine Laying Submarine Art |
| 1930 LAWRENCE DUMAN Submarine Boat Patent Print |
| 1930 EMANUEL Submarine Safety Device Patent |
| 1930 ELECTRIC BOAT CO Dry Mine Laying Submarine |
| 1930 QUINTEROS Submarine Saving Device Patent |
| 1930 GEORGS Submarine Life Saving Device Patent |
| 1930 GRIESHABER Dry Mine Laying Submarine Patent |
| 1930 CHRISTOPHER Sunken Submarine Indicator Art |
| 1930 FOX HARRY Submarine Escape Buoy Patent |
| 1930 ELECTRIC BOAT CO Rescue Submarine Patent |
| 1930 STEELE Submarine Safety Device Patent Print |
| 1930 NAAMLOOZE VENNOOTSCHAP INGENIE Submarine Boat |
| 1930 GRIESHABER Mine Laying Submarine Boat |
| 1930 RUBIE Submarine Rescuing Device Patent |
| 1930 OBIDZINSKI Safety Submarine Vessels Art |
| 1930 TAYLOR Submarine Wreck Indicator Communicating |
| 1930 SHOEMAKER Submarine Auxiliary Boat Art |
| 1930 CARROLL Submarine Escape Buoy Patent Print |
| 1930 KARL BEHRMANN Submarine Boat Patent Print |
| 1930 SIMPSON Mine Laying Submarine Patent Print |
| 1930 GRIESHABER Mine Laying Submarine Patent |
| 1930 THOMMES Submarine Rescue Device Patent |
| 1930 PAUL Life Saving Method Submarine Crews Art |
| 1930 SPEAR Rescue Submarine Patent Print Art |
| 1930 JOHN Submarine Salvaging Apparatus Patent |
| 1930 PAUL Fuse For Submarine Bombs Patent Print |
| 1930 STILES Boat For Submarine Inspection Patent |
| 1930 MARTIN Submarine Escapement Apparatus |
| 1930 LAWRENCE Submarine Boat Patent Print Art |
| PRE WWII 1930'S USN SUBMARINE JUMPER / UNIFORM - ID'D |