| 1920 KYSOR Motor Truck Construction Patent Print |
| 1920 JOHN DUNCAN Car End Construction Patent |
| 1920 KRAMER ANDREW Tank Construction Patent |
| 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 JONES Auto Mobile Construction Patent 22105 |
| 1920 LOCKWOOD Tank Car Construction Patent Print |
| 1920 HARTUNG ROBERT Ship Construction Patent |
| 1920 SHANAHAN THOMAS Car Construction Patent |
| 1920 EUGENE BROWN Metal Construction Patent |
| 1920 GASPARD Airship Construction Patent Print |
| 1920 BOUMA Hog House Floor Construction Patent |
| 1920 CHEW Ship Construction Patent Print Art |
| 1920 CURTISS Flying Boat Construction Patent |
| 1920 FRANK BOGUCKI Ship Construction Patent |
| 1920 FUGENE Construction Of Bogies Patent Print |
| 1920 GUSTAF MAGNUSON Ship Construction Patent |
| 1920 PLYM Airplane Construction Patent Print Art |
| 1920 JOSEPH MOONEY Metal Construction Patent |
| 1920 STEINMETZ Aircraft Construction Patent |
| 1920 MITCHELL Strut Construction Patent Print |
| 1920 THOMPSON Construction Of Ships Patent Print |
| 1920 PLYM Aeroplane Wing Construction Patent |
| 1920 GILBERT Toy Building Construction Patent |
| 1920 SLEFFEL Child'S Vehicle Construction Patent |
| 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 FERRIS HENRY Stall Construction Patent |
| 1920 CHEW RICHARD Ship Construction Patent Print |
| 1920 HENRY Aeroplane Construction Patent Print |
| 1920 HAGEN LARS Ship Construction Patent Print |
| 1920 PLYM Aeroplane Rudder Construction Patent |
| 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 |