| 1931 BAKER Handle Structure Children'S Vehicles |
| 1931 SCHMIDT Revolving Truck Loading Structure |
| 1931 FREDE Locomotive Structure Patent Print Art |
| 1931 LOUISVILLE Reflex Structure Switch Stands |
| 1931 SMALL Corrugated Wall Structure Patent |
| 1931 ANDREW A KRAMER Tank Structure Patent Print |
| 1931 JOHNSON Piston Valve Structure Wind Instruments |
| 1931 HALVOR Boat Structure With Detachable Cabin |
| 1931 GRIFFIN ALVAH Tank Structure Patent Print |
| 1931 GEN STEEL CASTINGS CORP Locomotive Structure |
| 1931 EDGAR AMES Deck Structure For Barges Patent |
| 1931 FOSTER Sound Absorbing Structure Patent |
| 1931 YORK Piston Valve Structure Wind Instruments |
| 1931 JONES Locomotive Tender Structure Patent |
| 1931 GEN STEEL CASTINGS CORP Railway Car Structure |
| 1931 EAKINS Supporting Structure Patent Print |
| 1931 DORN Metallic Structure Railway Cars Art |
| 1931 GEN Locomotive Tender Structure Art Print |
| 1931 UNION METAL PROD CO Metal Structure Railway Cars |
| 1931 CARMICHAEL Surfboard Pontoon Structure Art |
| 1931 FRIEDRICH Bed Structure Sewing Machines Art |
| 1931 BLUNT Locomotive Structure Patent Print Art |
| 1931 UNION METAL PROD CO Corrugated Wall Structure |
| 1931 WILLIAM Sectional Hull Structure House Boats Like |
| 1931 HEFTER Toy Building Structure Patent Print |
| 1931 COWLES Bird House Or Similar Structure |
| 1931 GEN AMERICAN TANK CAR CORP Supporting Structure |
| 1931 ESMOND Deck Structure For Barges Patent |
| 1931 JOSCELYN Hull Structure Ships Like Art |
| 1931 DORN Metal Structure For Railway Cars Art |
| 1931 UNION Metallic Structure Railway Cars Art |
| 1931 DRILLETTE Reflex Structure Switch Stands |
| 1931 PFLAGER Railway Car Structure Patent Print |
| 1931 TREIBER Bowling Alley Pit Cushion Structure |
| 1931 MILLER Pleasure Railway Structure Patent |
| 1931 UNION Bed Structure Sewing Machines Art |
| 1931 BROOKS Supporting Structure Tents Patent 47459 |