| 1939 JACOB Transport Tank Structure Patent Print |
| 1939 PLANTE ARTHUR Nest Structure Patent Print |
| 1939 DE SEVERSKY Aircraft Structure Patent Print |
| 1939 KNUTE Metallic Wall Structure Patent Print |
| 1939 GARDELLA Flagstaff Structure Patent Print |
| 1939 HILL Variable Airfoil Structure Patent |
| 1939 FLADER FREDRIC Wing Structure Patent Print |
| 1939 DE Corrugated Sheet Metal Structure Patent |
| 1939 REID Locomotive Coupler Structure Patent |
| 1939 PFLAGER Railway Truck Structure Patent |
| 1939 GLEDHILL Shed Structure Patent 6273 |
| 1939 HUGH Bumper Guard Structure Patent Print |
| 1939 JANDUS HERBERT Bumper Structure Patent |
| 1939 GRAY Expansible Building Structure Patent |
| 1939 SANDBERG Bumper Guard Structure Patent |
| 1939 BEMIS Building Structure Design Patent 23153 |
| 1939 CURTISS WRIGHT CORP Wing Structure Patent |
| 1939 GRENEKER Display Head Structure Patent 39739 |
| 1939 KINNC EDMUND Coupler Structure Patent Print |
| 1939 STOUT Portable Building Structure Patent |
| 1939 GEORGE C GUCKES Flagstaff Structure Patent |
| 1939 SCOTT Insulating Structure Patent Print Art |
| 1939 HUNTER Metallic Structure Patent Print Art |
| 1939 BIRD ARCHER CO Insulating Structure Patent |