| 1931 SCHMIDT Revolving Truck Loading Structure |
| 1931 DOWLING Loading Wheelbarrow Patent Print |
| 1931 DE Loading And Transporting Device Patent |
| 1931 LOUIS Combined Loading Cart Sifter Screen |
| 1931 MCBRIDE Mechanical Loader Muzzle Loading Mortars |
| 1931 EVANS AUTO LOADING INC Anchoring Art Print |
| 1931 COLLECTION EQUIPMENT CORP Self Loading Vehicle |
| 1931 CHAMBERS Method Of Loading Wrapped Pipe Art |
| 1931 GEN MOTORS CORP Loading Equipment Patent |
| 1931 COPONY AUTO LOADING Decking Art Print |
| 1931 MCCREA System Automobile Loading Transportation |
| 1931 FREDERICK Loading Automobile Vehicles Art |
| 1931 MACCHESNEY Use In Loading Cars Like Art |
| 1931 LUIGI Device For Loading Firearms Patent |
| 1931 EVANS AUTO LOADING INC Decking Art Print |
| 1931 ACME STEEL CO Use In Loading Cars Like Art |
| 1931 FRANK REBUCK Loading Device Patent Print |
| 1931 GEN PAINT CORP Method Loading Wrapped Pipe |
| 1931 WILLIAMS Loading Equipment Patent Print Art |
| 1931 OLMSTEAD Method Loading Bombs Art Print |
| 1931 ROMINE Portable Loading Platform Patent |
| 1931 HOWARD Self Loading Vehicle Patent Print |
| 1931 EVANS AUTO LOADING INC Wheel Chock Art |
| 1931 WOOSTER Combined Loading Dump Car Art Print |