| 1920 KYSOR Motor Truck Construction Patent Print |
| 1920 IVAR Cement Ship Construction Patent Print |
| 1920 FREDERICK Bunk Construction Patent Print |
| 1920 HOOPER Aeroplane Construction Patent Print |
| 1920 WILLIAM Construction Of Ships Patent Print |
| 1920 LOCKWOOD Tank Car Construction Patent Print |
| 1920 GASPARD Airship Construction Patent Print |
| 1920 CHEW Ship Construction Patent Print Art |
| 1920 FUGENE Construction Of Bogies Patent Print |
| 1920 PLYM Airplane Construction Patent Print Art |
| 1920 KAWNEER Airplane Construction Art Print |
| 1920 MITCHELL Strut Construction Patent Print |
| 1920 THOMPSON Construction Of Ships Patent Print |
| 1920 THOMAS Steel Car Construction Patent Print |
| 1920 HAGEN Ship Construction Patent Print Art |
| 1920 ALEXANDER Vessel Construction Patent Print |
| 1920 GORE Ship'S Hull Construction Patent Print |
| 1920 CHEW RICHARD Ship Construction Patent Print |
| 1920 HENRY Aeroplane Construction Patent Print |
| 1920 HAGEN LARS Ship Construction Patent Print |
| 1920 GUSTAF Ship Construction Patent Print Art |
| 1920 LLOYD Toy Cabin Construction Patent Print |
| 1920 VITULLI Construction Of Ships Patent Print |
| 1920 FRANK Ship Construction Patent Print Art |
| 1920 CARNEAL Aeroplane Construction Patent Print |
| 1920 HARTUNG Ship Construction Patent Print Art |