| 1930 ANDREW Cargo Discharging Ships Art Print |
| 1930 LUDER SCHRIEVER Porthole For Ships Patent |
| 1930 DE Propulsion Ships Art |
| 1930 NICOLA Life Saving Ships Like Art Print |
| 1930 DE MEO Propulsion Of Ships Patent Print Art |
| 1930 LUDER Porthole Ships Art |
| 1930 EVALD Hull Of Ships Patent Print Art |
| 1930 HILLS Raising Buoying Up Ships Art Print |
| 1930 CRAIN Controlling Ships' Steering Gears Art |
| 1930 LINN Method Raising Submerged Ships Art |
| 1930 GREEN Method Cooling Cargo Space In Ships |
| 1930 JOHN Protected Window Ships' Hulls Art |
| 1930 EMANUELE Net Capture Undersea Boats Oversea Ships |
| 1930 JOHN Life Saving Sunken Ships Art Print |
| 1930 SHINGO Enabling Hatch Loading In Rain Ships Like |
| 1930 GAY Method Means Propelling Ships Art Print |
| 1930 EVALD HOGNER Hull Of Ships Patent Print Art |
| 1930 HERMAN FISCHER Life Saving Sunken Ships Art |
| 1930 RODIN Emergency Section For Ships Patent |
| 1930 DOW Method Of Stabilizing Ships Patent |
| 1930 ALBERT Auxiliary Power Means Ships Like Art |
| 1930 ARNOLD Raising Ships' Cargoes Art Print |
| 1930 DOW CHEMICAL CO Method Stabilizing Ships |
| 1930 WARD Flanking Vane For Ships Patent Print |
| 1930 MICHEL Stabilizing Device For Ships Patent |
| 1930 ELLING Marking Salvaging Sunken Ships Art |
| 1930 MAX Arrangement Cutwater Rudders Ships Art |
| GB 1930 cover receved from HM SHIPS |
| SPAIN 1930 SG603 MIC512 40c COLUMBUS SHIPS HINGED MINT |
| 1930's BRASS SHIPS DISTRESS FLARE STRONG BOX (465) |
| 1930-40's SAINT MALO SHIPS BOATS FRANCE POSTCARD PC CPA |
| 1930 CLYDE - MALLORY LINES AD FOR THEIR FOUR SHIPS |
| (2) 1930's Military Planes & Ships Card Strips UNCUT NM |